Useful Tools

A shared phone-based log for feeds, nappies, sleep, medicine, weight, temperature, and milestones.

A multi-system calendar that brings Gregorian, Chinese, Islamic, Javanese, Balinese, lunar, eclipse, and almanac data into one Indonesian-language interface.

An open-source note-taking tool that extracts tasks, deadlines, vocabulary, and related notes while running entirely on the user's machine.

A local-first Chrome tool that captures citations, source passages, and provenance whenever you copy from the web.

A browser-based scanner checks PDFs, Office files, and images for recoverable text, metadata, hidden content, tracked changes, GPS, and other document leaks.

An iPhone and Apple Watch weight tracker that smooths daily fluctuations into a longer-term trend.

Neuro-CASA is a software layer for sperm-motility analysis that turns measurements into guaranteed intervals and withholds clinical grading when scale calibration cannot be verified.

A browser-based tool converts JPG, PNG, or WEBP photos into numbered paint templates matched to RAL Classic paint codes.

A sensor-agnostic HRV recorder for Polar Loop, H10 and other Bluetooth devices, with full-night analysis, training thresholds and raw-data exports.

An app for turning children’s drawings, family photos, and recorded narration into editable storybooks, travel diaries, keepsakes, and exported videos or PDFs.

Tiebook reads public U.S. Department of Labor LM-2 filings and produces cited readiness reviews and workpaper packets for accounting firms.

An interactive teaching nomogram for exploring how flow rate, valve area, and pressure gradients relate in aortic stenosis.

A local-first iOS and Android music player for high-resolution files, including FLAC, ALAC, WavPack, APE, and DSF.

A browser-based metronome and tap-tempo tool with adjustable meters, accents, subdivisions, sounds, and practice guidance.

A Greek directory for finding running, trail, triathlon, swimrun, open-water and cycling events by sport, date and region.

A research tool that turns a bracket, name, or organization into a dossier assembled from public video, social, news, and records.

A paperless toolkit for duplicate bridge players: convention cards, personal scoring, results checking, reservations, and table assignments.

A location-based task app sorts household errands into four actions—bring, buy, get, and do—then ties them to places such as Costco, work, or a lake house.

A Twitch-connected identity system turns participating chat channels into fictional countries, issuing viewers passports and stamps as they travel between them.

An Android app that turns assistant-generated code into private, offline, single-purpose apps built for one person.

A daily pricing tracker comparing 396 LLM models from 58 providers across token costs, context windows, workloads, and price history.

A browser-based calculator estimates galactic cosmic-radiation dose for flights, then tracks cumulative exposure in a local crew logbook.

A free training planner that builds athletic workout blocks for dads from the equipment, days, and minutes they actually have.

A maritime laytime calculator that reads SOFs, NORs and charter-party terms, then produces a reviewable timesheet and demurrage or despatch calculation.

A browser-local tool that detects hidden text characters, image metadata, Content Credentials, and some provider-specific watermark signals.

A Warhammer 40,000 probability calculator that compares unit loadouts, targets, weapons, and attack sequences.

A free website-migration tester that compares source and target sites for missing pages, content drift, and visual regressions.

A macOS utility that scans storage, shows results as they arrive, and updates its disk map immediately when files are deleted.

A renewal and expiry tracker for domains, SSL certificates, trials, contracts, subscriptions, and personal dates.

A free Farming Simulator 25 calculator that works backward from a target product to the required materials, recipes, and approximate crop area.

A set of browser-based readiness tools for firefighters, covering fireground decisions, flow path, aerial rigging, company playbooks, and equipment inspection.

A fan-built archive that lets you search timestamped bars from FlipTop and Motus battles, then jump to the relevant moment on YouTube.

A cash-on-delivery tracking tool for African merchants that follows orders, deliveries, courier balances, and repayments through WhatsApp.

Forecast Your Money simulates retirement plans using real market history, tax tables, and household accounts without requiring an account or bank credentials.

A free FPV drone simulator with four maps, acro flying, phone controls, and optional USB transmitter support.

A local-first toolkit for working with PDFs, images, text, SVGs, TIFFs, and ZIP files without uploading files to a server.

A Malaysian delivery concept that replaces printed home addresses with a private, opaque code and a controlled driver handoff.

A Central Texas marketplace that sends one portable-restroom request to multiple suppliers so customers can compare quotes.

A local-first macOS music player that indexes files on your disk, plays them, and casts them to Google Cast speakers.

A Wear OS hydration reminder that combines heart rate, activity, weather, and logged drinks to decide when—and how much—you should drink.

Lunel is an open-ended sensory-play app for small children, built around touch-responsive worlds rather than goals, scores, or instructions.

Manarah is a planned phone service that translates live Friday sermons for listeners who do not speak the language used in the mosque.

A collection of browser-based utilities for files, developer data, Markdown, CAD formats, calculations, and everyday conversions.

A Hebrew calculator that estimates former soldiers’ financial entitlements and turns them into a timeline of deadlines and next steps.

An offline Android utility for hashing files and text, checking downloads, verifying folders, and exporting desktop-compatible sums files.

A branded home-search tool lets real-estate agents curate listings, add personal notes, and collect each household member’s reaction separately.

A browser tool that converts logos and images into HDR assets whose selected highlights can exceed ordinary screen white.

A state-specific calculator compares the running cost of heat pumps with gas, propane, oil, and electric resistance heat.

A free collection of 62 browser-based calculators, guides, and reference tools for designing and programming VEX competition robots.

A desktop music workstation that analyzes humming and audio into notes, chords, keys, timelines, and MIDI.

An ADHD-friendly task app that turns a photo or sentence about an overwhelming project into roughly 12 small steps, then serves three per day.

A macOS tool that changes an iPhone’s reported location and moves it through walking, driving, or parked states without installing anything on the phone.

An interactive map of Japan’s rail network, with live train movement and bilingual historical coverage of lines, stations, operators, and train types.

A twelve-question browser tool estimates how much of your digital life is readable from the outside.

An offline experience passport for skilled-trade apprentices that logs work, collects supervisor signatures, and organizes hours into licensing-ready proof.

A cooking app that maps Chinese dietary therapy’s hot-to-cold food classification onto a Kelvin scale, then builds meals around it.

An offline file-search tool that uses on-device AI to find, read, sort, and extract information from photos and documents.

KillMetadata removes supported EXIF, GPS, author, date, and media metadata from photos, documents, video, and audio without uploading the files.

Workshop software for Australian mechanics that connects bookings, bay boards, job cards, parts, invoicing and customer approvals.

A rewards-planning tool for Indian credit-card holders that ranks cards, tracks caps and exclusions, and prices points against transfer routes.

An independent Lou's Lagoon guide that maps resources and island routes, compares player evidence, and turns gadget recipes into flight plans.

A homeschool scheduler that rebuilds the year around subjects, missed days, field trips, co-op activities, and out-of-term learning.

A free Maryland app that combines live fire and EMS calls with dispatch audio, searchable transcripts, and distance-sorted mapping.

A browser music tool lets guitarists play a song’s melody while piano supplies the chords, bass, and beat.

An iPhone camera app that turns filmed scenes into music-synced videos without a timeline, account, or upload.

A consumer tool that compares up to three moving estimates, translating fees, exclusions, contract language, and valuation coverage into a clearer likely-cost range.

OpenLab is an open-source, self-hosted workspace for cataloguing electronics, locating components, and planning projects from the stock already in your lab.

A Malayalam soundscape tool that layers village sounds with weather, time-of-day ambience, radio stations, and a sleep timer.

A browser-based record-collection tool that uses Discogs data to surface albums you own but have not played recently.

A browser-based image converter, resizer, and finishing tool that keeps every file on your device.

An alpha browser tool drafts IEC 61131-3 Structured Text from plain-English descriptions, converts it to ladder logic, and runs it through a PLC simulator.

A macOS mail utility that groups an entire mailbox by sender, then lets you trash, archive, or unsubscribe from message piles in one action.

A browser-side scanner that checks pasted emails, documents, webpages, and prompts for common prompt-injection warning signs.

A calm iPhone and iPad focus timer where completed sessions grow a collectible 2D reef.

A Turkish wind-energy analysis that measures imbalance costs from public EPİAŞ data and invites operators to request a plant-specific report.

A pay-per-photo service converts mannequin, flat-lay, phone, or on-model images into consistent product shots on pure white.

A browsable library of haptic profiles for GBA games, with downloadable RetroArch cheat files and a linked N64 section.

A multiplayer dice-game toolkit that turns a big screen into the table and phones into controllers.

A browser-based planner that models home Wi‑Fi coverage, wall loss, router placement, and mesh options across 2.4, 5, and 6 GHz.

A GPS-based alarm designed to get chronically late people out the door, not merely awake.

A free Windows app uses Last.fm listening data to generate album collages, band and genre word clouds, listening clocks, and other desktop wallpapers.

A browser-local draft checker that flags risky promises, pricing claims, and other sentences before they leave your screen.

A privacy-first household inventory app that turns camera scans of drawers, shelves, and boxes into searchable visual records.

An on-device astronomy companion that identifies stars, tracks planets, and lets you move through the night sky by gesture and time.

A keyboard-first triage layer that sorts Apple Reminders tasks through an Eisenhower-style urgent-versus-important matrix.

An open-source USB system for creating wallets, exporting watch-only keys, and signing Bitcoin PSBT files on an offline machine.

A bilingual live tracker and reservation page for Sirikatha Travels’ semi-luxury bus between Tangalle and Trincomalee.

A planning tool that combines observing conditions, telescope equipment, target catalogues, and available time into an astrophotography programme.

A planned sleep assistant that retimes wake-ups for two partners, including after an unexpected nighttime interruption.

A free address-based checker that combines USDA soil-survey data with cited foundation-repair cost ranges.

An interactive calculator that turns AI token usage, cached context, turns, and apology phrases into a mock “grovel tax.”

A browser extension that filters Twitch’s directory, arranges multiple streams in a grid, and reorganizes live chat.

A browser extension that filters Twitch, arranges multiple streams in a grid, and reorganizes chat without an account or server.

An onboard reference hub for a hybrid-drive Kraken 50 sailing yacht, covering emergencies, procedures, passage plans, maintenance, stores, training, and equipment manuals.

A desktop app for synchronizing local video files and YouTube streams with friends, including voice, facecams, chat, and reactions.

Paste a page URL and TakedownRoute identifies its network operator, CDN, registrar, and relevant U.S. DMCA designated-agent filings.

A browser-based four-question diagnostic that identifies whether a running toilet needs a flapper, fill valve, flush valve seat, or another repair.

Fredo turns a short-term rental’s house guide into guest answers across Airbnb, Booking.com, direct bookings, and a no-download guest app.

A treasury and player-ledger tool for amateur sports teams managing dues, game-day expenses, and fronted cash.

Utilerio offers a free, no-sign-up collection of browser tools for barcodes, label files, data conversion, developer tasks, shipping, and business calculations.

A Windows app that batch-processes photographs and checks whether the exported files actually meet delivery requirements.

A small workshop of free, open-source Mac utilities for window snapping and separate mouse-and-trackpad scrolling.

A phone-controlled system for coordinating welcome screens, agendas, decks, video, countdowns, and remote presenters across meeting rooms.

A no-sign-up vocal practice tool that maps pitch, resonance, harmonics, and formant estimates while you sing.

A Mac dictation tool that types into the app already on screen, rewriting speech in five modes for $5 a month.

A free browser-based tool for cleaning, transforming, analyzing, and exporting CSV and Excel files.

An iPhone and iPad app for reading the Quran, listening to recitations, searching hadith and duas, and studying tajweed without an internet connection.

A family emergency-contact system that lets someone reach trusted people from any borrowed phone, without knowing their numbers.

A browser-based construction takeoff service that counts drawing sheets, sets a flat project price, and delivers a graded quantity workbook in four days.

A set of browser-based tools for repairing Excel files, redacting PDFs, opening email archives, and unlocking protected spreadsheets without uploading the files.

A browser-based workspace offering 58 PDF and image tools, including merging, OCR, conversion, redaction, compression, and PDF comparison.

A free English-and-Hebrew prompt game for friends, couples, families, and anyone who wants a better conversation.

Tokenly displays live Claude, OpenAI, and Gemini usage as quiet, color-coded rings at the edge of a Mac screen.

Rental operations software for independent car-rental fleets of 5 to 50 vehicles.

A focused hub for electric-bike mods, comparisons, build costs, riding tricks, safety guidance, laws, shops, and creators.

Aire is an AI-assisted TRIZ workspace that converts engineering problems into structured contradictions, matrix lookups, ranked inventive principles, and exportable reports.

A paid family-site service for photographs, genealogy, messages, calendars, and household contacts.

A compliance workspace for EHR manufacturers preparing evidence, technical files, and declarations under the European Health Data Space regulation.

A consumer-checking tool that scans online shops for ownership, terms, domain age, payment methods, and other warning signs.

A free audio tool for boosting bass, shaping mixes, reducing noise, and exporting MP3 or WAV masters.

A browser-based railway headway and capacity simulator for testing routes, rolling stock, signalling, timetables, and train spacing.

A live research tool that compares Bowman prospect-card listings with confirmed sales and ranks apparent bargains.

A free set of excavation, trenching, hauling, land-clearing, and material calculators for converting field measurements into quantities and costs.

A QR-based restaurant tool lets guests call staff, request small items, order more, or ask for the bill without an app or login.

A phone camera app that recreates film stocks, vintage cameras, camcorders, film frames, date stamps, and analog imperfections.

A cattle planning tool that converts breeding or bull-exposure dates into calving windows, herd schedules, and downloadable records.

ChapterMend diagnoses, repairs, and formats complete audiobook chapters for retailer submission, then returns the files with a plain-language technical report.

A monitoring service that finds buying signals across Reddit, X, LinkedIn, YouTube, Hacker News, and competitor sites, then sends urgent leads immediately and the rest in a daily brief.

A bibliography checker that compares references with CrossRef and OpenAlex, flagging entries as verified, mismatched, or not found.

A public-data search tool for health inspection grades, scores, histories, and violations across covered U.S. cities.

A grocery-price comparison tool for matching the same basket across Woolworths Waterfall Corner, Checkers Sixty60, and Pick n Pay.

A browser-based corpus preparation tool for linguists that segments source files, lets users choose what to retain, and records editorial decisions.

A set of free calculators tests residency and immigration thresholds, then estimates the dollar cost of crossing them.

A multilingual kitchen-safety training tool that turns a QR scan, short quiz, and completion data into a printable record.

A shutter-first mobile tool that turns photos of roadside signs, work vans, business cards, and printed lists into categorized contacts.

CUUFILE repairs unfinished Sony video files in the browser and accepts recovery cases involving deleted, formatted, or unreadable memory cards and hard drives.

A UK deal-finding site that scores retailer offers against price context, product usefulness, clarity, and freshness.

A browser-based image tool that changes JPG, PNG, or WebP density metadata—or resamples images for a target physical print size.

A $29 service that combines official vehicle and Arizona paperwork facts with a buyer’s driveway photos.

A browser-based fair-food guide that searches items across vendors, maps booths, and lets visitors save, rate, and share what they want to eat.

A shutter-first app for wholesalers, trades, and crews that crops contact details from vans, signs, cards, and printed lists, then organizes them for category-wide outreach.

A private browser-based converter that turns photos into pixel art, with grid, palette, adjustment, and export controls.

Enter a city to see cited water chemistry, salt-system legality notes, and treatment options matched to common household problems.

An iPhone app that reads the GPS tags in your existing photos and turns them into a globe of countries, cities, and landmarks you have visited.

A free, one-sale-at-a-time Etsy calculator that estimates what remains after marketplace fees, materials, packaging, postage, and optional labour.

A time tracker and invoicing tool for solo consultants, built around producing an itemised PDF invoice at month end.

A timezone-aware heartbeat monitor for cron jobs, batch scripts, ETL pipelines, and other scheduled work.

An experimental HF propagation tool for exploring radio paths by location, band, power, UTC hour, and space-weather conditions.

A collection of focused iPhone apps for receipts, shifts, tattoo records, colour formulas, woodworking, espresso, car maintenance, aquariums, and more.

Keporia builds and manages digital loyalty cards for independent Canadian cafes, bakeries, salons, studios, and restaurants.

Custom field-service and compliance software for Australian electrical contractors, spanning certificates, licence tracking, circuit testing, invoicing, and audit records.

An offline iPhone and iPad app converts U.S. PLSS and Canadian DLS or ATS legal land descriptions into navigation estimates.

A browser-based collection of 14 free tools for map projections, coordinate conversion, US survey grids, and geomagnetism.

A browser-based set of calculators for contractors and small service crews, covering job profit, markup, labor burden, and change orders.

A free macOS menu bar app for freezing or recording the screen, annotating it without a traditional tool palette, and passing the result to people or coding agents.

Movie Duel builds a personal all-time film ranking through head-to-head choices drawn from IMDb’s Top 250.

A Dutch rainfall-alert tool where you draw an area, set a precipitation threshold, and route alerts to email, webhooks, or its built-in inbox.

An offline construction calculator for feet, inches, fractions, rafters, spacing, plan scales, material costs, and job reports.

A field guide that combines Oʻahu hikes and dives with routes, access context, conditions, media, saved plans, and outing records.

A 2D plan generator where a small purpose-built language and the visual layout update each other.

A free browser-based calculator suite for film gauge, gram weight, extrusion output, roll length, bubble geometry, gussets, and dart impact.

A Vietnamese point-of-sale app for Windows that handles sales, inventory, customer debt, cash records, and reports without cloud accounts or routine syncing.

A hand-prepared weekly sales page built from a CSV that a customer emails in.

A browser-based generator for printable blank manuscript paper, from a single music staff to custom quartet, piano-trio, guitar-tab, and tablet layouts.

A restaurant-operations tool that records staffing exceptions, routines, tasks, procedures, training, service problems, and shift handoff.

Rush Builder is a free, unofficial card database and deck-building tool for Marvel Hero Rush.

A no-signup scanner checks a website for 122 common security problems and sells the detailed fix report for a one-off $19.

A resale assistant creates a studio-style garment image, suggests a local price, and writes marketplace-ready listings in 21 languages.

A browser-only suite for calculating grades, GPA scenarios, credit progress, attendance rules, and study workload.

An offline-first workbench for connecting firearm inventory, reloading data, range sessions, chronograph results, target logs, ballistic calculations, maintenance, and training records.

Maple combines foliage timing, weather, elevation, and location notes to help photographers plan fall shoots across Vermont.

A Chrome tool that turns an entire web page into one PNG, JPG, PDF, or clipboard image.

A restaurant POS and kitchen display system for Apple, Android, macOS, and browser devices, with offline operation and support for existing receipt printers.

A collector-built record search that says it compares listings across Discogs, eBay, Amazon, Bandcamp, major retailers, and smaller shops.

An AI running tool that builds kilometre-by-kilometre race strategies from a course, goal time, elevation profile, and race-day weather.

A web and macOS tool that places a saved stamp or signature onto PDFs at its real printed size, then exports a stamped copy.

An AI-assisted speaker rehearsal product that records a delivery, scores it across eight components, and explains what the numbers mean.

A Mac capture tool that turns highlighted text into tasks or bookmarks, preserving their original context and optionally handing tasks to Claude Code or Codex.

An accountless publishing tool that turns Markdown text into a public, shareable URL.

A Thai 3D-printing service lets customers upload an STL file, preview the job, choose resin or FDM, and see an estimated price before ordering.

Tailplate reviews an airplane’s logbooks and FAA records to produce a records-adjusted report before a purchase.

A field tool for residential electrical service-load calculations, permit-ready PDF reports, and simple EV-charger site plans.

An alert service that watches Starship launch signals and tells South Padre Island visitors when it may be time to book a trip.

A Vietnamese fitness app turns logged meals, workouts, and adherence into the growth of a pixel-art clone.

A guitar-rig builder that maps artists' gear and signal chains to budgets from £275 to £2,500, with tools for tone matching and DSP alternatives.

A private, community-by-community way to find people others have actually hired, with the recommender’s name attached.

An iPhone app that automatically records your drives and turns the roads you travel into a personal, gamified map.

A resort-by-resort snow forecast for 32 New England mountains, with probability ranges, powder alerts, and a public forecast scoreboard.

A state-by-state directory for private-well testing, separating county programs, certified laboratories, and mail-in kits that send PDF reports.

An independent database tracking professional bucking-bull rankings, career records, ride histories, events, and bull-versus-rider matchups.

Yumzi is a planned mobile app that converts saved TikTok and Instagram recipe reels into a weekly dinner plan and an Albert Heijn grocery basket.

A desktop IPTV player for macOS, Windows, and Linux that resumes titles from the precise frame where you stopped.

An offline-first iPhone workflow turns commercial kitchen exhaust-cleaning photos, work scopes, deficiencies, and acknowledgments into client-ready reports.

A hosted search tool for dumpster, roll-off, and trade-waste licenses in Chicago, Los Angeles, and New York.

A free Etsy profit calculator that subtracts marketplace fees, materials, postage, advertising, and the maker’s own time from each order.

An iPhone app maps live webcams worldwide and places six verified streams side by side.

Caesura is a private iPhone app that uses retrospective check-ins to turn fragments of a day into a truthful, nonjudgmental time record.

Dune Apps makes on-device iPhone tools for scanning receipts and tracking work mileage, alongside guides about privacy, expenses, and VAT.

A Pan-India rental platform where owners define household rules and seekers browse only homes that fit how they live.

An engineering calculator for local stress analysis of rectangular clip attachments on cylindrical shells.

A free Windows launcher that gathers DOS and point-and-click games into one library, with DOSBox and ScummVM configured inside it.

A free quote-versus-cost calculator for outdoor-trade operators who price jobs involving labor, mileage, materials, disposal, and payment fees.