API

Typatone turns typed letters into musical notes, letting users compose music while writing.

Scriptable automates iOS tasks with JavaScript and provides access to native system APIs.

Automate tests for signup flows, transactional email, and spam scores with Testmail’s email testing tools.

FireMonkey combines user-script and user-style management in a browser extension, with help and changelog resources provided by the project.

Patatap pairs animated shapes with sound and lets users create melodies by tapping, with a warning that the site contains flashing images.

Browse wallpapers on WallWidgy, with image search, device filters, favorites, and a dedicated image viewer.

Docci extracts information from complex tables and long-form documents to automate document-processing workflows.

Automated machine learning toolkit and a drop-in replacement for a scikit-learn estimator.

LibreChat is an open-source chat interface with agent, model switching, message search, and self-hosting features.

IntoDNS.AI checks DNS and mail server settings including SPF, DKIM, and DMARC, combining results in one report.

Library for doing GPR (Gaussian Process Regression) in OCaml. Comes with a command line application.

The Powder Toy is a desktop physics sandbox that simulates effects such as air pressure, velocity and heat.

Online code editing and compilation are available in Judge0 IDE, a free open-source tool.

RocketPy provides software and information for rocket flight simulation.

Gobble Bot combines a website, PDF, or YouTube link into a text file for preparing custom chatbot training.

Langdock helps organizations deploy and manage AI tools across teams with controls for secure, flexible adoption.

Find URLCheck package and signing certificate details on the project page for this Android app.

FreeTube provides a desktop YouTube interface for watching videos on Windows, macOS, and Linux.

macFUSE lets macOS users create file systems in user space through a software package.

DDSR lists Nostr relays configured for different domain-specific purposes.

Lilu provides a macOS kernel extension for patching other extensions, libraries, and processes.

sxcu.net provides an anonymous cloud uploader and link shortener for ShareX and similar screenshot tools.

TwitchIO provides an asynchronous Python library for the Twitch API and EventSub.

Skip sponsorship segments in YouTube videos with iSponsorBlock, a jailbreak tweak using the SponsorBlock API.