Useful Tools

An open-source Android app for detecting specimen landmarks and running geometric morphometry on-device, alongside a browser annotator and model-training workflow.

Dónvara Supply Watch uses public data to forecast Australian medicine shortages, with local stock implications available under data-sharing agreement.

An in-browser combustion-engine simulator for building, tuning, and testing engines, with live sound and a suite of performance readouts.

A fan-made multilingual map connects locations from the “Seishun Sick” video with bonus stops, route guidance, GPS check-ins, and concert-night details.

A free, browser-based collection of practical calculators and reference tools for amateur radio and electronics.

This open-source Mac companion lets you mark something on screen, ask a question, and see an explanation drawn as sketches, animations, or 3D models.

An open lab for Medical Affairs teams, with five browser-based tools, a shared whiteboard, and source code to take home.

A free songwriting studio for turning humming, singing, beatboxing, and keyboard or MIDI input into editable tracks and notation.

A gentle habit-tracking app grows a small companion as you log everyday tasks, without streak penalties or account registration.

A free planner that connects GPU cluster choices to estimated power, cooling, U.S. site rankings, equipment lead times, and electricity costs.

A free Bible app pairs the King James Version and Chinese Union Version, with Scripture reading and narration—including AI-generated voices made from recordings—with permission.

A free WordPress plugin that checks nine WCAG 2.1 AA issues and points to the page and element behind each finding.

QCbell helps food businesses track recalls, enforcement actions, inspection failures, and supplier histories using public food-safety data.

A clinical calculator collection for healthcare professionals, with patient details that can carry across tools and results that display the math.

Armath presents an Armenian keyboard for iPhone with swipe typing, sentence-aware corrections, and next-word suggestions.

A research prototype lets clinicians explore how symptom evidence may shift estimates of comorbidity among hEDS, POTS, and MCAS.

Free, open-source firmware for the Xteink X4 Pro adds Indic-script rendering, an on-screen charging display, and detailed reading history.

A browser app and open-source script that remove aircraft tones and mains hum from video audio to reduce clues about where it was recorded.

A free fiber-craft site with printable charts, technique guides, animated demos, games, and tools covering nine crafts.

A Mac menu bar app that records both sides of calls, transcribes them on-device, and produces notes, decisions, and action items.

A price converter that expresses purchases in chicken-over-rice platters, using a displayed $9 platter price.

A free planner that matches passport country and personal profile to migration routes, requirements, and costs, starting with Germany.

A local research workspace for connecting source passages, notes, and ideas across documents, with AI suggestions that require approval before changing your work.

Nightglint lets people record sky sightings with a time, location, direction, and optional photo or video, then browse reports on a public map.

A forthcoming iPhone app for finding Taipei-area cycling, running, walking, hiking, and climbing routes, with offline maps and playback of a day’s outings.

Self-hosted coffee-roasting software for tracking roasts, controlling compatible machines, managing green coffee, and making bag labels.

A Japanese reading-log app for iOS and Android that tracks books you want, own, and have finished.

A phone-based checkout app for neighborhood produce shops in Argentina, with pictured produce, weight-or-price entry, and QR, cash, or transfer payment options.

An anonymous map for reporting owl sightings and swoops at Nike’s World Headquarters campus in Beaverton, Oregon.

A calculator compares car cargo-space measurements with dog-crate dimensions, sorting results into fits, tight fits, and crates that won't fit.

Arteal searches city streets for routes shaped like a figure, letter, image, or user-drawn design, then lets you download the result as a GPX file.

A free public-beta set of VCV Rack modules that snap together into custom synth rigs.

A practical guide to downloading AO3 bookmarks as full works or exporting public bookmarks as a link list or CSV.

A no-signup tool for laying out a band on a scaled stage and preparing related input lists, monitor mixes, and sound-desk files.

A directory of EU and UK supplements organized around batch-specific lab reports, including lab identity, batch number, heavy-metal results, and report freshness.

Channel Keys combines five federal pharmaceutical data sources into linked tables delivered inside a customer’s Snowflake account, with weekly refreshes.

An interactive atlas lets visitors explore the world’s borders, states, and peoples from 3400 BC to today.

A free, no-signup tool for drawing tapestry crochet charts with a grid, text, and decorative elements, plus a counter for stitches or chain stitches.

ExifZero inspects and removes metadata—including AI labels, prompts, GPS data, and camera details—from image files in the browser.

A workspace for pairing Chinese and Latin fonts, adjusting type settings, and exporting design tokens for Tailwind and shadcn.

A searchable database of generative-media films, series, creators, credits, and festivals, with editorial picks and curated ways into the catalog.

A free, self-hosted tool for two-way syncing Google, Microsoft 365, iCloud, CalDAV and read-only .ics calendars.

A free macOS vocabulary app uses on-screen OCR to look up words in PDFs, ebooks, subtitles, and other hard-to-select text, then saves each lookup for review.

A shared gig-management app for working bands, DJs, players, crew and managers, covering booking, show planning and onstage coordination.

A Mac and Windows desktop app for collecting clipboard history, screenshots, files, and notes in one place, then searching or moving them into another app.

A free, open-source remote-support tool that lets helpers connect to a PC through a server you run yourself, with the recipient approving each session.

A Finnish heating calculator compares firewood with electric heat and estimates when to light a fireplace.

Hum or play a song nearby, and HumFinder searches its catalogue for likely matches.

A Tanzania trip-planning site that compares Kilimanjaro routes and helps assemble a climb, northern safari, and Zanzibar stay.

A browser-based checker tests image tiles for visible seams in straight, half-drop, and half-brick repeats, and offers seam fixes at the original pixel dimensions.

Movo presents a free, open-source spending tracker that turns bank notification emails into categorized transactions on your phone.

NoiseTrail’s Android app logs overnight noise with timestamps, approximate levels and short clips, then assembles a report and complaint letter.

A browser-based tool for opening older document formats and saving them as modern files.

A source-linked strict-curl results archive with rankings, lifter comparisons, a ranking calculator, and competition records.

A pitch-practice web app for violin, viola, and cello players that marks notes as flat, in tune, or sharp.

A free set of U.S. immigration tools interprets visa-bulletin cutoffs and related data for specific applicant situations.

A map builder that turns a recorded or drawn route into a 3D terrain model for printing, with options for mapped hikes and city skylines.

A searchable index comparing wet-slip and dry-stack storage rates at marinas across the US.

A daily conditions and trip-planning guide for ski mountains across Southern Idaho, Northern Utah, Lake Tahoe and the Eastern Sierra.

A free map scores mushroom-growing conditions for nine species across France’s communes, with daily updates and an eight-day forecast.

A browser-based tool for previewing MIDI arrangements and exporting them as music videos.

A comparison guide estimates monthly costs for Shopify AI support, search, and recommendation apps at three store sizes.

A browser-based builder for patching Elektron Syntakt firmware with Synfact and selectable mods.

A data publication tracking Taiwan-listed companies through translated announcements, investor flows, monthly revenue, investment filings, supply chains, and GPU rental prices.

Talmud česky pairs Czech machine translations of the Babylonian and Jerusalem Talmuds with the Hebrew-Aramaic originals, search, indexes, a Daf Yomi calendar, and an offline app.

A free, no-sign-up test estimates receptive English vocabulary through adaptive four-choice questions, with a live estimate, 95% range, CEFR level and percentile.

A searchable reference to Ayurvedic herbs, medicines, food rules, formulations, safety alerts, and evidence.

A free study site pairing Agrippa’s occult text with comparative tarot readings and a described 3D workshop for exploring card symbols.

A searchable comparison of franchise opening costs, reported unit revenue, and closures, drawn from FDD Items 7, 19, and 20.

The site offers a statement scanner for finding forgotten subscriptions and step-by-step guidance for removing saved cards from 86 services.

A Vietnam travel guide combining monthly, regional weather figures with rail, visa, and Tet ticket guidance.

An interactive radio that plays bands with upcoming shows at selected venues, with genre controls and a view of coming dates.

A free site estimates whether you can see the northern lights, solar eclipses, and meteor showers from specific places.

A compatibility tracker and install guide for 547 World of Warcraft: Forever add-ons.

A Chinese-language color reference with searchable named hues, color standards, brand palettes, and tools for building, converting, and checking colors.

A free browser-based tool turns text—and, according to the page, photos—into cross-stitch charts, with fabric sizing and thread estimates.

A Persian-language collection of tools for checking connectivity, filtering, speed, DNS, domains, and related network details.

A browser-based viewer for legacy InfoPath templates and submissions, with free single-form PDF saving and bulk exports described but not yet on sale.

A desktop app that turns one video clip into LED ribbon files formatted for selected stadium screens.

GradeInClass lets teachers scan student QR codes or barcodes, record scores as they move around class, and send grades to a CSV or Google Classroom.

A free Windows and Mac utility adds Behringer WING and X32/M32 preamp gain and 48V control to Waves eMotion LV1’s channel strip.

A Mac music instrument combining step sequencers, a continuously looping multitrack tape, a chip synth, samplers, drum machines, and beat-synced effects.

NodeWave is a pre-release Android app for sending messages, voice clips, photos, and positions between nearby phones without internet access.

A browser-based fuel inventory and ordering tool for independent gas station owners, built around their daily tank readings.

A free, open-source Windows disk analyzer that maps storage use in a clickable treemap.

A browser-based viewer for opening Adobe XD files, inspecting their contents, and exporting artboards.

An app for competitive shooters that pairs stage-video analysis with match results, performance comparisons, and progress tracking.

Antilure presents an on-device email checker that flags suspicious messages and highlights the phrases, links, or sender details that prompted a warning.

A free tool for removing photo backgrounds and downloading full-size transparent PNG or WebP images.

A phone-first recordkeeping tool that says it reads hive-lid notes and prepares inspection logs and Texas agricultural-valuation reports.

A paid parts lookup for finding equivalent auto-electrical components across brands, plus parts listed for alternators and starter motors.

Paste a deck link or list to get analysis of its mana consistency, engine structure, resilience, and possible card swaps.

Dog Longevity Pills tracks FDA review steps, trial progress, and stated age and weight ranges for several drugs being studied to extend dogs’ lives.

A free photo tool that develops raw or phone images through simulated colour-slide or black-and-white film chemistry, rather than applying a preset.

LatSouth offers company records from nine Latin American government registries, harmonized into a common English-language dataset.

A searchable guide to short waymarked walks in Italy, paired with nearby independent wineries and osterie.

A browser-based tool that turns music into real-time visuals for DJs, VJs, and bands.

A phone-based toolkit for asphalt crews to calculate tonnage, check layer depths, and record signed dip sheets.

Meddah presents a tool for matching narration with licensed visuals, historical context, maps, and explainable cuts.

A MIDI companion for OP-XY on iPhone and Mac that captures loops, reshapes them with four reorderable tools, then sends a take back or exports it.

An independent set of fitness-test calculators and standards references covering multiple U.S. military services.

mood.ink pairs a paper journal with a free website for logging morning and evening moods and viewing trends over time.

Morph presents a free file-conversion and cleanup tool for Mac, Windows, iPhone, and Android, with processing described as happening on-device.

A free, browser-based canvas for turning typed notes into timers, events, polls, checklists, and bill splits.

Peron is an iPhone train app presented as tracking delays, replacement buses, and connections across Slovenia.

A Windows app for therapists that organizes session notes into CBT and psychodynamic diagrams, plus recurring-topic statistics.

A baking tool for resizing recipes, converting cup and spoon measures to grams, and printing a revised ingredient list.

A searchable directory of 50 U.S. apparel factories, sample rooms, and small-batch studios, filterable by location, minimum, service, and product type.

A planted-aquarium fertilizer calculator that works out dry-salt doses or stock-solution recipes for several dosing methods.

An unofficial Escape from Tarkov companion for item and flea-price research, ammunition comparisons, hideout calculations, maps, and weapon builds.

A searchable atlas of Hacker News’ monthly “Who is hiring?” threads, with views of hiring volume, remote work, stated pay, roles, companies, and locations.

A dashboard for a two-player golf rivalry, with match records, season standings, form tracking, forecasts, and course suggestions.

A web builder takes a room list or CSV and lays out tactile and Grade 2 Braille sign proofs, with a CSI 10 14 23 submittal package and sign order options.

A free generator creates AI-authorship badges in four levels, with six formats and no sign-up.

AirStack compares the tools you pay for with what you already have, presenting sourced information to help assess whether a subscription is still needed.

Akrofit presents an interval timer that lays out the whole workout in a visual strip, alongside Tabata, rounds, and stopwatch modes.

A browser-based instrument for worship leaders and church teams to play synthesized pads, sequence chords, shape sound layers, and add tempo-synced rhythms.

A Southeast Asia travel guide that lays out visa stays, arrival-card requirements and links to official forms, with trip-planning tools.

A fit checker compares selected car boot measurements with the folded dimensions of prams and buggies.

A backup-verification service checks S3-compatible storage for missing, stale, or unusually small backups, then sends alerts.

A comparison site for Union Arena, Dragon Ball Super Fusion World, and Digimon cards and sealed products, with listings from stores across several regions.

A web prototype for assessing existing sea-lamprey barriers and sizing a proposed structure from workbook inputs.

A planned offline app for tracking coffee-bean inventory, roast age, brewing notes, grinder settings, and spending.

A restaurant map that connects food bloggers’ TikTok videos to the places they feature, starting in Lebanon.

A browser-based preflight tool checks picture-book PDFs for bleed, trim, and margin issues, with a free three-page check.

A lookup tool for error codes across washers, dryers, dishwashers, fridges, and ovens.

A free browser-based tool for turning a beat into a YouTube upload package, including a thumbnail, video, title, tags, and description.

An iPhone and iPad app calculates brick and block coursing, bond layouts, cuts, and unit conversions for masonry work.

A food-recall and news site that combines publicly available FDA recall records with reporting about a major Cyclospora outbreak.

A Korean-language search site that gathers reported lost-and-found items from places including transit stations, airports, and police stations.

A Japanese tool calculates uneven dinner-bill splits across multiple rounds, then prepares a payment message for LINE.

A weekly alert service for two-way radio dealers, tracking FCC license renewals in their counties.

A Puget Sound forecast tool giving hour-by-hour go, maybe, or no calls for kayak and paddleboard launches.

A tracker comparing AI-music policies across 12 distributors and streaming services, alongside Suno’s commercial terms.

A home electrical-load calculator for checking whether a service may accommodate an EV charger, heat pump, induction range, or other new load.

A short quiz helps people compare possible fertility and parenthood pathways, including treatment at home or abroad.

A free online die for D&D and other tabletop games that changes its face values as you play.

An interactive map and research board compare AI products by who pays, who does the work, and how each charges.

Chestwise describes a fleet tool for tracking medicine-chest stock and expiry dates, then comparing inventory with requirements profiles an organization defines and approves.

An interactive atlas for exploring Japanese land-price survey points by prefecture, municipality, use, price, and change over time.

Cloudless presents a gradual quit plan for vaping or smoking, with free counting and a paid plan that lowers daily limits toward zero.

A Korean-language price reference for Costco’s Ilsan store, with a 949-item catalog, discounts, and week-to-week price changes.

A searchable catalog tracks coffee and tea prices from independent sellers, with price histories to help shoppers assess whether a sale is a real drop.

A browser-based tool that converts KML or KMZ routes into DJI drone missions for monitoring roads, railways, and other long linear works.

A free pantry-craft hub with fermentation, brewing, sourdough, chocolate, and natural-dye guides, calculators, and printable log sheets.

A browser-based calculator tracks Schengen 90/180 days across multiple trips and can check whether a future stay fits.

A landed-cost calculator for cross-border Etsy, eBay, and Shopify sellers pricing orders shipped to the US.

A menu-bar utility for keeping a Mac awake during builds, downloads, uploads, and other long-running jobs.

Discky scans a Mac for models, development caches, build folders, app leftovers, and other disk use, then offers removal through the tool that owns each item.

Dockside brings together porter tools, guest contact, crew information, port schedules, and team operations for the Port of Galveston.

A tool for Roblox creators that searches Marketplace listings for copies of their clothing and accessories and drafts copyright reports.

A research workflow for turning variant files into reviewable, cited molecular evidence reports for tumor-board preparation.

A browser-based tool that scans drum sheet music, lets you correct the transcription in a grid, and plays or loops it at a chosen tempo.

A public directory of heat-pump and ductless mini-split installers across eight US launch states, with ownership labels tied to documented sources.

A searchable directory of record fairs across the UK and Ireland, with separate pages for coin, toy, antiques and stamp fairs.

An Android app that follows a user’s fantasy football players and switches to the relevant live NFL game on their own IPTV channels, with scores on screen.

An Italian-language management system for fish farms that brings tank maps, feeding, inventory, and fish-lot traceability into one place.

A free Windows utility that opens a floating, hover-activated pill of tools, with an optional replacement taskbar.

A UFC analytics project publishes matchup probabilities, fighter ratings, event records, and experimental fight simulations.

A search tool for historical maps from the Library of Congress, other archives, and USGS collections, with licensing and credit information.

A small-batch audio software shop offering reverb, delay, compressor and loudness-meter plugins.

FrostDepthCheck estimates normal-winter frost depth for US counties and gives a suggested dig depth for footings, posts, or water lines.

A Japanese capsule-toy guide gathers new releases, prices, product lineups, store information, and tools for planning visits.

A Galveston cruise-terminal hub connects porter tools, guest pages, crew information, schedules, and team-specific workspaces.

Dockside brings together guest information, porter tools, a free port schedule, and resources for ship crew visiting Galveston.

A firmware project that turns an ESP32 CYD display into a car dashboard for OBD2 engine data, optional GPS, and trip logging.

A Florida-focused map for adjusters and restoration teams, combining emergency dispatch calls with weather warnings, radar, storm reports, and power outages.

Gutlog turns meal photos sent through ChatGPT, Claude, or another MCP client into a food-and-symptom diary.

A Hebrew-language Android app for logging breastfeeding, bottles, pumping, diapers, and optional sleep, with on-device storage and PDF summaries for clinic visits.

An iMessage service texts students when a seat opens in a class section they’re watching.

SupplierPilot presents a tool for combining suppliers’ price and stock files, choosing a supplier for each product, and syncing prices and inventory to Shopify.

A worship-team songbook for Malayalam, Tamil, Hindi, and English, with transliterated lyrics, chord transposition, setlists, and projection features.

A Korean service that gathers arts opportunities and lets users browse by field and region, with email alerts for new calls and approaching deadlines.

An open map of meta-analyses comparing treatments for hepatocellular carcinoma, organized by treatment hierarchy and comparison class.

The site helps visitors find when selected Great Lakes campgrounds and Boundary Waters permits open for booking, with an option to get a calendar reminder.

A searchable directory ranks gymnastics gyms by performance, with national, state, country, program, and level-based views.

Enter a USDOT number to see a carrier’s UCR fee bracket, MCS-150 update month, and authority and insurance status.

Heartside helps pet caregivers track a dog or cat’s sleeping breathing rate and keep readings ready to share with a vet or family.

A French-language prototype for identifying songs by humming and playing a guessing game with friends.

InboxVue presents a browser-based viewer for opening, searching, and exporting common email archive and message files.

An iPhone and iPad video-delay camera app, with a limited webcam demo that lets you try the idea in a browser.

An interactive map shows recreational crab and shrimp seasons by Puget Sound marine area, alongside tides and razor clam dig dates.

A free calculator for workers under Japan’s one-month variable-hours system, comparing planned shifts with actual hours to estimate statutory overtime.

A Turkish point-of-sale system for cafés and restaurants, covering table orders, kitchen workflows, QR menus, delivery, inventory, and fiscal cash registers.

A browser-based woodworking planner for designing furniture, previewing it in a room, and preparing cut lists.

Klangbild is a customizable Roon remote and now-playing display for Apple TV, iPad, and iPhone, currently offered as a free public beta.

SwitchCut turns a live-switcher recording and separate camera files into a multicamera timeline for Premiere Pro or DaVinci Resolve.

A free, self-hosted PXE tool for inspecting PCs and deploying Windows 11 or Linux from a web console.

Lafzi presents an English dictionary and vocabulary app for iPhone and iPad, pairing word meanings with pronunciation, usage notes, and etymology.

A searchable Wisconsin directory of deer, beef, and pork processors, with county browsing and published hours and prices where available.

LooReview describes a map for finding nearby bathrooms, with filters for access, cost, facilities, and opening hours.

Magical Mystery Audio sells DRM-free DAW plugins modeled on vintage studio hardware, including compressors for vocals, drums, and mix buses.

A web tool that turns MBOX, EML, or MSG email files into a chronological or thread-grouped PDF, with optional indexes and attachments.

A date tool for checking when selected Mid-Atlantic campgrounds open for reservations, with an option to get a calendar reminder.

Paul’s site tells the story behind an app for coordinating Milton’s breathing checks, daily care, and vet information across two homes.

A self-hosted, open-source workspace that organizes notes as nested, zoomable outlines, with tasks, tags, links, and live collaboration.

A browser-based tool for turning a dish photo into an A4 kitchen plating guide, with AI-assisted dish and ingredient entry.

Muralo is a Windows desktop utility for placing notes, checklists, widgets, photos, and file shelves directly on the wallpaper.

An Android app for older adults that presents warnings around risky phone transactions and offers a one-tap call to a family contact.

An invitation editor for Jewish celebrations, with design, print-file, guest-list and RSVP features.

Netool offers free online converters for CNC file formats used by Morbidelli, SCM, Homag, Weeke, and Brandt machines.

A filterable scorecard compares free, built-in, and paid chart indicators by price, source transparency, repaint risk, and claims.