Useful Tools

A bowling simulator that trains players to read oil patterns, predict ball motion, adjust their line, and practice spare shooting.

A $34 pair of NFC pucks that records when you tapped the door and kitchen wall before leaving home.

A collection of 180 small LLM-powered roasts, character engines, generators, games, and other playful utilities.

An offline-first field inspection app for plant rooms, basements, venues, and other places where connectivity cannot be trusted.

A browser-based theatre tool that assigns wireless mic packs scene by scene and prints the paperwork a backstage crew needs.

A searchable archive of U.S. public-domain recordings that can be streamed, downloaded, and reused without permission.

An Android app for people with color blindness that identifies colors through a phone camera and explains them in plain language.

A collector’s tool that estimates an auction lot’s likely all-in cost and preserves its sources, questions, and provenance.

A browser-based PDF-to-DXF converter that preserves curves, CAD layers, and 1:1 paper dimensions without uploading the drawing.

A Hungarian-language financial record-keeping tool for entrepreneurs and traders, combining income, receivables, debts, and financial runway in one immutable journal.

Foodakl turns meal photos into estimated nutrition records without database searches, portion dropdowns, or manual typing.

Inventory software for used auto-parts yards that drafts listings from donor vehicles, sends them to multiple channels, and removes them everywhere after a sale.

A trail-camera sorting tool for whitetail hunters that separates likely-empty frames, identifies animals, and builds private histories for named bucks.

A Chrome extension that automatically tracks the languages you watch and hear across YouTube, Netflix, and Twitch.

A free classroom app for teachers, with seating charts, group generation, name drawing, timers, schedules, noise monitoring, stations, and activity planning.

Isleta turns the black cutout on a MacBook into a compact surface for music controls, volume, notifications, file drops, and wake greetings.

A four-person Chinese studio building WindSeek, an Android weather app that combines live weather, radar-based storm identification, stargazing guidance, dawn-sky forecasts, and AI weather reports.

A browser-based Stardew Valley 1.6 mod maker for repainting sprites, replacing sounds, rewriting text, changing values, and inventing new game content.

A free collection of browser-based utilities for images, video, EXIF data, and PDFs, with processing kept on the user's machine.

A macOS and Windows background app that plays recordings of real mechanical switches whenever you press a key.

An email reminder app that interprets natural-language notes and decides when—and how often—to remind you.

A macOS desktop app that analyzes local music, arranges a harmonically sequenced DJ set, and writes it directly to Denon Engine DJ USB drives.

A Hindi-English directory of Indian shops, supermarkets, and Saturday-open stores across Israeli cities.

A specialist catalog for finding LitRPG and progression-fantasy books by mechanics, tone, series status, and the way power grows.

A browser-based generator that gives developers a workout, mini-game, or side quest while their coding agent is thinking.

A browser-based image tool for blurring or blacking out faces, text, emails, phone numbers, and card digits without uploading the file.

A publisher-focused audiobook proofing tool that compares recorded audio with a manuscript and produces timestamped, exportable reports.

A data-breach notification tool that determines which US jurisdictions are triggered, then generates state-specific letters, attorney general filing packets, and deadline calendars.

An iPhone app for recording assets, debts, and net worth as dated snapshots across 63 currencies.

A Windows-based architectural daylighting platform that combines physical simulation, standards evaluation, measured HDR skies, and knowledge-driven design workflows.

A sourced buying-risk database for used commercial wood chippers.

A personalized city-ranking tool that reorders American and European places according to the qualities you value.

A pre-launch contract review workspace that compares incoming agreements with a team’s negotiated positions and flags matched, deviating, or missing clauses.

A free, open-source macOS menu bar utility that lets you hold a mouse or trackpad button briefly, release it, and keep dragging or selecting until the next click.

Cubitora converts a plain-language home-improvement project into material quantities, estimated costs, a shopping list, and a printable project plan.

An offline puzzle collection spanning classic Sudoku, rule-mixing variants, Killer Sudoku, and the card-based Solduku.

A Panama-made inventory tool for material depots, hardware stores, and construction sites, designed to work from a phone even without a signal.

A metal-detecting app combining a legality-coded map, private find logs, GPS trails, community discoveries, and a geology layer for likely gold-bearing ground.

A free drone wind calculator that compares current conditions with published limits at 10 m, 80 m, and 120 m.

An interactive world map tracking recent earthquakes, with historical playback from the past 30 days through major events since 1900.

A goal-planning app that recursively breaks large projects into manageable tasks, then puts today's work on a home-screen widget.

A digital record system for the physical equipment crews warehouse, transport, deploy, and inspect.

Estibra automates warehouse data entry by typing pre-alerts, waybills, tracking numbers, labels, and dimensions into an existing CargoTrack account.

A live translation console for multilingual congregations, turning a church sound-desk feed into translated audio channels and captions.

A Korean filming-location explorer that maps drama and movie scenes, with episode timestamps, directions, nearby food, and an app for recreating the shot on location.

FlightWifi tells travellers what kind of internet a specific flight is likely to have before they book, using aircraft and airline connectivity data.

Fontbench lets you draw letters, trace ghosted guides, and export the result as an installable TrueType font.

An iPhone practice tracker that measures playing time, rest, streaks, focus areas, and practice history, with optional Strava sharing.

A private practice room where users rehearse holding their ground with a simulated, deliberately dismissive clinician.

Tessen is an offline Mac dictation tool that puts cleaned-up, punctuated speech directly into the app and field where the cursor already sits.

A browser collection of multiplayer and solo board and card games whose dice rolls and shuffles can be independently verified.

A private iPhone journal for recording GLP-1 injections, weight, symptoms, reminders, and the period after treatment.

An invite-only, self-hosted tool for splitting household and trip expenses, settling debts, and planning the itinerary in one shared group.

A browser-based microscopic traffic simulator for modelling intersections, demand, signals, queues, pedestrians, and vehicle movement.

A bilingual collection of hand-built logic puzzles in which players place suspects, follow clues, and identify the culprit.

A Sapporo-based project by a nursery teacher and an IT engineer offering free, registration-free web apps for baby food, baby gear, and choosing a daycare or preschool.

A shared household board for messages, calendars, shopping lists, expense tracking, and private family conversations.

A browser-based toolkit that compresses, resizes, converts, crops, and batch-processes JPG, PNG, and WebP images to exact requirements.

An iPhone and iPad golf game that reads your swing through the camera and sends the course to a TV.

A Japanese comparison table ranks hometown-tax return gifts by how many grams arrive per ¥10,000 donated.

A free browser-based planner checks whether a laser cutter can reach, fit, exhaust, and operate safely in a measured space.

A suite of separate, purpose-built tools for balloon and event-decor businesses, including rental inventory tracking and client-facing invoicing.

A free collection of lawn, garden, irrigation, and indoor-growing calculators, plus a personalized year-long lawn planner.

Legerity is an in-development EPUB reader for iPhone and iPad, with typography controls, bookmarks, search, contents, and quiet reading experiments.

A personal workspace for clinical recruitment, patient follow-up, literature study, paper projects, translation tasks, and AI-assisted workflows.

A French-language catalogue of low-tech and bioclimatic solutions for domestic needs, searchable by need, resource, or name.

An offline iOS music player for people who own their music, with synced lyrics, editable tags and covers, playlists, widgets, and on-device recommendations.

A pre-launch paid-newsletter and member-community platform for Arabic, Persian, and Urdu writers, with right-to-left publishing, email delivery, and payouts for markets outside the US and EU.

A free Narcotics Anonymous meeting finder that opens to the next nearby meeting, with filters for time, day, format, and location.

A browser-based music game where players guess songs by year, artist, and title across two party formats.

A browser-based collaborative drawing room with protected personal layers, live room controls, replay video, and canvases up to 8192×8192.

Norma generates geometric marks and photo remixes through measurable proportions, letting you explore, keep a region, and rebuild the composition around it.

A browser-based tool that converts photos into printable fuse-bead patterns with color palettes, bead counts, and supply links.

An AI-assisted tool that reads a Japanese rental deposit settlement statement and compares each charge with rules based on Japan’s Ministry of Land, Infrastructure, Transport and Tourism guidelines.

A family-focused toolkit of Chrome extensions that blocks distractions, limits classroom browsing, quiets YouTube, filters videos, and measures site time.

A Mac utility reads long Claude Code conversations, prepares the next prompt, and helps resume work without dragging the entire chat back in.

A browser-based calculator estimates employer and employee paid family and medical leave premiums from payroll and headcount by state.

A live Spanish-language dashboard comparing vegetable prices across Almería’s alhóndigas, auctions, and cooperatives.

A live monitor and forecast explorer for the stratospheric polar vortex, using ECMWF data across multiple atmospheric levels.

A guided New York planning tool that helps families create an executor binder for someone who may need SSI, Medicaid, or OPWDD services.

A suite of battery, solar, inverter, power, and electronics calculators for sizing systems and checking electrical relationships.

Provenance turns commercial leases and amendments into cited, verifiable facts, then derives obligations and deadlines from those records.

A revenue-integrity tool for Iowa non-emergency medical transport operators that records trips offline, builds claims, and checks broker payments against contract terms.

An offline-first record system for sheep, goat, and small-dairy farmers, tracking each animal's history, breeding, treatments, weights, and withdrawal periods.

A relay-race app that predicts each leg, times handoffs, estimates van arrivals, and gives spectators a live, read-only browser view.

A Bluetooth-based Android app designed to connect trapped people with nearby rescuers without internet, GPS, or cellular service.

A named-install service that texts a caller within a minute when a Greater Sydney owner-operator plumber misses a call.

A multilingual catalog tracking prices, availability, specifications, and categories for 115 humanoids, quadrupeds, industrial arms, service robots, and logistics machines.

RollSense is a planned route-feel tracker that uses a securely mounted smartphone to record how wheelchair journeys actually feel.

A roofing takeoff and quoting tool for Colorbond, tile, and shingle systems that converts roof dimensions into material quantities and client pricing.

Rufe brings guinea-pig weights, meals, medicines, routines, and everyday notes together in one place.

A pre-launch custody system for pharmacy networks that binds logger data to individual lots and flags temperature excursions before a shipment is accepted.

A coaching workflow that converts one Hudl export into opponent tendencies, call sheets, scout-team rep sheets, and player quizzes.

A Japanese-language directory of 171 public observation cameras covering volcanoes, national parks, wetlands, rivers, migrating birds, and more.

A focused tool for agents and promoters to calculate show break-even points, build artist offers, and track responses from the original deal.

A focused soapmaking workspace for sizing molds, calculating lye and water, building recipes, resizing batches, and estimating cost per bar.

An Android storage cleaner for junk, duplicate photos, large files, screenshots, and app storage, with deletions routed through a recycle bin first.

A stain-treatment guide that sorts advice by stain, material, and what has already happened to it.

A Chrome extension that converts PDFs, Office files, images, EPUBs, and web pages into Markdown, HTML, plain text, or JSON entirely on-device.

A browser-based tool and Chrome extension that turns difficult HTML, CSS Grid, ARIA, and scrolling web tables into CSV, Excel, TSV, or Markdown.

A browser-local tool that finds and removes invisible characters, unusual Unicode, non-standard spaces, and other hidden text artifacts.

A fitness calculator suite for strength, running, sleep, body composition, calories, and protein that compares formulas instead of hiding them.

A live music-collaboration app that randomly pairs musicians around the world for remote jams.

Kip tracks recurring chores and maintenance by turning each task into a tile that fills with time until it is due again.

VisaPaddy checks passports, bank statements, insurance, bookings, and other visa documents against one another and against stated requirements.

A beta platform for designing gearboxes, shafts, bearings, housings, and related assemblies using stated ISO, DIN, VDI, and AGMA procedures.

A browser-based calculator that estimates what a stock, ETF, or cryptocurrency investment would be worth today if you had bought or held it on a chosen date.

Eine geplante iPhone- und iPad-App mit täglichem Bibelvers, zwei vollständigen Übersetzungen, Volltextsuche, Leseplänen und privatem Gebetstagebuch.

A free Chrome extension that checks whether a business is running ads on Meta, Google, or TikTok.

A Mac studio that turns screen recordings into polished product films with realistic Apple-device scenes and directed camera movement.

A live Toronto directory showing which restaurant and bar patios are sunny right now, when the sun will reach them, and whether they are open.

A workspace for creating purchase orders, commercial invoices, and export packing lists from one shared shipment record.

A free Spanish-language toolkit for scaling crochet patterns, substituting hard-to-find yarns, estimating skeins, pricing handmade work, making tapestry charts, and counting rows.

An interactive music-harmony reference with explanations of intervals, scales, chords, cadences, voice leading, and a built-in score editor.

A virtual office where walking up to a colleague opens a video and audio call, and walking away closes it.

A Japanese web tool classifies PC gamers into 24 aim types, then suggests setup changes to compare across mouse grip, sensitivity, keyboard, desk, chair, and other gear.

Akagotchi turns ordinary messages, voice notes, and photos in a family Telegram group into a shared baby logbook.

A time-limited photo and video album for weddings, family events, trips, and other gatherings where multiple people need to contribute and collect original files.

A free, ad-free toolbox for converting images, documents, data, audio, and video locally in your browser.

A field-ready browser app that reads water-sensitive paper cards to measure spray coverage, droplet size, uniformity, drift risk, and effective swath spacing.

Axnable captures and checks fraud evidence for banks and insurers before scam sites, redirect chains, and customer records disappear.

Upload a screenshot of your investment positions and Bagcheck assigns your portfolio an archetype.

A browser-local tool that turns CSV or Excel rows into individually templated PDF documents, bundled into a ZIP.

A free browser-based toolkit for translating text to braille, reading braille from photos, and converting PDF or DOCX files into BRF documents.

An offline Android app that calculates quilt binding, backing, half-square triangles, flying geese, borders, sashing, and more.

A free USDOT and MC-number lookup for checking operating authority, insurance filings, fleet size, and other FMCSA carrier records.

A free tool that checks reference lists against CrossRef, OpenAlex, OpenLibrary, and Google Books, while also generating citations from sources such as DOIs, ISBNs, URLs, and PDFs.

A beta converter turns Australian bank-statement PDFs into reconciled Excel workbooks and Xero- or QuickBooks-ready CSVs.

A used-CNC buying database that combines asking prices with spindle risk, repair economics, downtime exposure, and maintenance evidence.

A browser-based diagnostic bench for testing controller buttons, sticks, triggers, vibration, deadzones, and observed input timing.

CostBand provides location-specific cost ranges for home and property work, alongside material-price trends and a solar-installation calculator.

A cottage-food compliance tool that turns a ZIP code into state rules for licenses, sales caps, allowed foods, costs, and labels.

Crisp is a free, open-source macOS utility for external-monitor brightness, HiDPI scaling, presets, arrangements, virtual displays, and other display controls.

An Argentine practice-management app that connects appointments, collections, ARCA invoices, patient records, and WhatsApp reminders.

Dayglass Trace analyzes an audio recording in the browser, then exports a synth patch for the Dayglass Form VST3 plugin or standalone app.

A live fantasy football draft tool that recalculates a roster-aware top-five board after every pick.

A Windows tool that estimates a website’s server time from HTTP Date responses, network round trips, and repeated samples.

A browser-based image tool that removes backgrounds and makes passport photos without forcing images into a square crop.

A Chrome extension that examines a user-selected Gmail message and produces a local report about sender and link evidence.

GameLogr lets youth and amateur hockey or soccer crews split live game tracking across several people, then merges their taps into shared scoreboards, play-by-play, and player stats.

A comparison index of 154 generators, covering starting and running watts, noise, runtime, carbon-monoxide shutoff, fuel type, and CARB compliance.

An India-focused app that compares grocery and ride prices across services including Blinkit, Zepto, Instamart, BigBasket, Uber, Ola, Rapido, and Namma Yatri.

A macOS menu bar app that watches DNS records across four resolvers and notifies you when they all return the value you expect.

A life-in-weeks calendar that turns your age and chosen life expectancy into a live grid, with optional email or SMS reminders.

A dated, sourced reference for USCIS processing times, visa requirements, visa-bulletin dates, and embassy wait times.

A free, no-account Pokémon GO companion for building Great, Ultra, and Master League teams from your own collection.

A browser-based PDF page editor for deleting, extracting, merging, rotating, reordering, and adding image pages.

A GLP-1 companion that ties a daily protein target to a user's dose cycle, with meal scanning and nausea-aware nudges.

A one-tap baby logbook for recording feeds, nappies, sleep, growth, and shared care—even without a signal.

A hotel-search tool that lays out nightly prices across hotels and dates in one visual grid.

A Chinese-language tool that scores an IP from 0 to 100 using infrastructure type, routing, blacklist status, DNS, and other network signals.

An Egyptian service that lets someone scan a QR sticker on your car and send you an alert without seeing your phone number.

Paste a YouTube, Instagram, or TikTok link and KPin extracts Korean places, verifies them against map listings, and gives you reusable place cards.

A vehicle lookup tool that calculates legally fixed Japanese vehicle-inspection costs and tax increases for cars older than 13 years.

A Spanish-language checker for links suspected of phishing, scams, and WhatsApp fraud.

MakerTherm proposes a 150 °C chamber for drying filament and running controlled annealing cycles on large 3D-printed parts.

An iPhone, iPad and Mac app for running football matches, tournaments, seasons, lineups, live displays, reports and post-match evaluation.

A free browser ruler for measuring in millimetres, centimetres, decimal or fractional inches, points, picas, and pixels.

A free browser-based toolkit for applying, scoring, and tracking 40 clinical psychometric instruments without accounts or a server.

A recipe calculator for balancing artisanal gelato by water, sugars, fats, stabilizers, total solids, POD, and PAC.

Pinglight is an upcoming iOS app that shows nearby Bluetooth broadcasts, matches them against on-device registries, and labels each identification with a confidence level.

A search-first library of 1,000+ AI-generated images, offering downloads for $0.001 each and custom image creation for five cents.

A no-signup bill-splitting web app where friends share a six-character tab code, claim what they ate, and see the shortest list of repayments.

A free England-and-Wales postcode research tool that gathers sold prices, crime, flood warnings, mining risk, heritage, noise and school-distance data before a property viewing.

A browser-based invoice renderer that turns flexible form data or JSON into selectable PDFs or PNGs, without requiring an account.

A self-hosted SIP PBX with a browser softphone, call routing, queues, trunks, and unlimited extensions, deployable on your server, VPC, or hardware.

A free companion site for the Sandustry game, combining material data, a density calculator, production-chain planner, research tree, and factory guides.

A French-language tool for diagnosing and repairing corrupted MP4 and MOV files, with a free browser-based diagnosis and a preview before payment.

A local session board for tabletop game masters to trigger music, ambience, effects, and transitions from one output.

A Mac clipboard manager that stores, searches, and pastes text, code, images, colours, formulas, and tables.

A German interactive tool for composing a flower bouquet, getting AI-assisted suggestions, scanning flowers from a photo, and sharing the finished arrangement as a link or image.

An AI takeoff tool for subcontractors that turns blueprint PDFs into editable, trade-specific quantity tables and Excel, CSV, or printable exports.

A focused home-curing calculator that scales salt, sugar, and pink salt #2 ratios by meat weight and generates a printable recipe card.

A cinema timeline spanning 1888 to today, plus daily games for blind film ratings and clue-based movie identification.

A browser-based art studio with five drawing machines: Paint Pendulum, Symmetry Blot, Spin Art, Fluid Pour, and String Pull.

Troco calculates exact change and shows which notes and coins to hand over, with support for Brazilian real, US dollars, and euros.

Free Singapore checklists for cancelling a mobile number, moving house, or handling SMS meant for the previous owner of a recycled number.

Cabine schedules interpreting teams, booths, equipment, relay chains, run sheets, invoices, and interpreter payouts for conference and corporate interpreting agencies.

A browser-based painting-analysis tool that measures the value gap between two points in a photo and reduces the image to a chosen number of value bands.

A DMARC monitoring tool that identifies legitimate senders and helps domain owners move from `p=none` to `p=reject` without breaking their mail.

A pre-build validation service that turns one paragraph about an app into a landing-page funnel, ad angles, and a tracked paywall test.

An offline sequencing tool for building yoga classes pose by pose, setting timing and cues, then teaching from a focused timer.

A Polish web app for group-oriented accommodation sites, combining seasonal bookings, rooming lists, payments, meal counts, and reception printouts without spreadsheets.

A local-first browser suite of five micro-tools for making GIFs, batch-renaming files, editing code and text, sorting photos by EXIF data, tracking stored objects, and removing outdoor wind noise.

A free browser-based guitar workspace with a microphone tuner, interactive scales and chords, staff notation with TAB, and a complete fretboard chart.

A browser-based sound meter that estimates local noise levels using a device microphone, with dBA/dBC/dBZ weighting, history, calibration, and exposure guidance.

An unofficial Korean archive that explains and lets visitors play brain games from survival programs.

A tool for truck drivers to log dock arrival and release times, calculate detention pay, and create a broker-ready claim.

A live tracker for Japan-exclusive figures, Gunpla, trading cards, and other hobby releases, including pre-orders, lotteries, and restocks.

A free, no-signup suite of running calculators covering pace, race prediction, training, heart-rate zones, splits, track intervals, and performance.

An AI-powered tool that generates AAC symbols from typed words and lets users save, download, print, and assemble them into sentence boards.

An iOS screen-time app that locks distracting apps and lets users unlock them with keys earned during focused work.

An interactive basketball possession simulator that lets you arrange players, choose offensive and defensive strategies, and receive a model-generated shot grade.

An evidence-led Roblox wiki covering the game's training loop, weights, Jump Strength, Cash upgrades, Brainrots, updates, and codes.

A privacy-first household finance tool that keeps a shared ledger, verifies transfers, assigns spending fairly, and hunts for savings on your own computer.

A browser tool that converts copied Korean Path of Exile item text into English text that can be pasted into Path of Building.

A Shopify app for fixed packs, mix-and-match offers, volume discounts, BOGO deals, free gifts, build-a-box campaigns, product recommendations, and stacked combos.

A Japanese manga-release database listing new comics by publication date and estimating when ongoing series will return.

Corton is a field-logging and invoicing tool for solo and micro-firm private investigators.

A bookkeeping tool for Colombian garment workshops that turns voice notes, text, or photos into records of production, sales, credit, payments, and inventory.

A free, in-browser toolbox for compressing photos, preparing government-form documents, merging PDFs, cropping signatures, and making shop UPI QR codes.

Doromir is an Android alarm clock that opens a full-screen voice recorder when you wake, then turns the recording into a searchable dream journal.