ProvenDay Puts an Audit Trail Behind Business Dates
A date calculator for business days, public holidays, market closures, settlement calendars, and U.S. equity settlement dates.
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122,112 catalogue cards
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PyWebLib: Real Python in a Browser
A browser-based CPython teaching environment with Turtle graphics, beginner game-building tools, coloured output, and working input().
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Quantum Interconnects Explained
A plain-language guide to the hardest link in quantum networking: converting microwave signals from qubits into optical signals that can travel through fiber.
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Quiet Weather — the sky, without the noise
A forthcoming Canadian weather app that shows forecast agreement, official alerts, radar, precise precipitation timing, and eighteen home-screen widgets without ads, accounts, or tracking.
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Quorum: The Chapter Office in One Console
Quorum is chapter-management software for YPO, EO, and Vistage groups, combining events, RSVPs, forums, payments, surveys, media, and member profiles.
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QuoteDo — Quoting by voice, then WhatsApp
A multilingual quoting app for tradespeople: describe a job aloud, set the prices, and send a properly formatted estimate by WhatsApp, email, or text.
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Raaga Wheel: Every Raga Has an Address
An interactive guide to the 72 melakarta ragas of Carnatic music, with scales, swara variants, janyas, songs, and the Katapayadi naming cipher.
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Radial Timers: countdowns you can see at a glance
A free countdown timer that drains 20 concentric rings instead of displaying only a changing number.
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Rangabot, the Faithfully Local Assistant
An open-source personal AI assistant that runs on your computer, keeps its data local, retrieves from private documents, and exposes evidence for important answers.
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Rangabot, the AI assistant that keeps its distance from the cloud
Rangabot is an open-source, local-first assistant for conversation, learning, coding, document analysis, and private memory.
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RateYourTools.org: Reviews from the Woodworking Shop
A community review site for woodworking tools, covering purchases such as table saws, jointers, planers, and bandsaws.
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Rep Battle: Push-Ups That Fight Back
An iPhone fitness game uses the camera to count clean repetitions, turn them into damage, and match players in 60-second push-up duels.
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Rescate Andino Atacama, on call in the Andes
The public home of a volunteer mountain-rescue organization in Chile’s Atacama Region, offering emergency coordination, route reporting, training, and outdoor safety information.
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Revelo, Restoring Photographs Without the Cloud
A Mac app that restores faded, damaged, and soft old photographs while keeping the originals on your computer.
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rideSOLTA — Cycling routes with the surface truth included
An interactive guide to road, gravel, and mountain routes that pairs maps and elevation profiles with photos, surface breakdowns, and practical ride notes.
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Рия, один вопрос
A Russian-language interactive dating invitation made for one specific person.
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Rizzbox — the texts you never sent
A no-code tool for building Y2K-styled confession cards, complete with custom steps, GIFs, buttons, and response tracking.
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Romance Events, Before the Tickets Vanish
A searchable registry of romance-book signings, conventions, tour stops, release parties, and author profiles.
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The Ronaldo Archive
A fan-made statistical archive of Cristiano Ronaldo’s career, with searchable match logs, visualizations, records, trophies, honors, and original writing.
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RoomStack: A Home Inventory You Can Finish in an Afternoon
RoomStack helps iPhone and iPad users photograph and catalog their belongings room by room, then export insurer-ready PDF or CSV reports.
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Ruck.vet Reads the VA Claims System Back to Veterans
A free beta toolkit helps veterans filing their own VA claims compare descriptions with the rating schedule, map possible secondary conditions, draft personal statements, and read parts of a VA decision or exam.
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RuПочта: team email on your own server
An open-source webmail client and admin panel that sits on top of existing IMAP and SMTP servers.
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SafeStepAI Explains the Phishing Warning
A free browser extension that checks links and pages through five layers of phishing, malware, scam, and social-engineering detection, then explains its verdict in plain language.
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Save Meia Praia: A Campaign for Lagos’s Dunes
A bilingual community campaign asking for a proposed luxury resort near Meia Praia to be paused until the planning file is published and a current environmental assessment is completed.