Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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React Testing Library
Simple and complete React DOM testing utilities that encourage good testing practices.
DOM Testing Library
Simple, framework-agnostic DOM query utilities that test your UI the way real users interact with it.
FastAPI
A modern, high-performance Python web framework for building APIs with automatic validation, serialization, and interactive docs.
rich
A Python library for rendering rich text, tables, progress bars, and syntax-highlighted code in the terminal.
Ruff
An extremely fast Python linter and code formatter, written in Rust, built as a drop-in replacement for Flake8, Black, isort, and dozens of plugins.
websockets
Build correct, fast WebSocket servers and clients in Python with asyncio, threading, or Sans-I/O APIs.
Redux
A predictable, framework-agnostic state container for JavaScript applications.
Typer
Typer is a Python library for building CLI applications, using type hints to generate arguments, options, validation, help text, and shell completion automatically.
Celery
Distributed task queue for running asynchronous jobs, scheduled work, and complex workflows across Python applications at scale.
Bubble Tea
A Go framework based on The Elm Architecture for building terminal UIs, from simple prompts to full-window, high-performance TUI applications.
lo
A Lodash-style Go library built on Go 1.18+ generics for working with slices, maps, channels, and functions.
Orama
A dependency-free full-text, vector, and hybrid search engine that runs entirely in JavaScript.
fastest-levenshtein
The fastest JavaScript/TypeScript implementation of Levenshtein edit distance
isort
Automatically sorts and organizes Python import statements
Remeda
A TypeScript-first utility library with data-first and data-last function variants, lazy pipe evaluation, and fully typed transformations.
Markdown
The reference Python implementation of John Gruber's Markdown, with a pluggable extension system for converting text to HTML.
flake8
The CLI linter that wraps PyFlakes, pycodestyle, and McCabe complexity checks into a single Python style and error checker.
immutable-js
Persistent immutable List, Map, Set, and Stack collections for JavaScript with structural sharing.
OAuthLib
Generic, spec-compliant OAuth1, OAuth2, and OpenID Connect implementation for Python
turf
The complete, modular geospatial analysis engine for JavaScript and TypeScript, bundling every Turf.js module under one install.
pendulum
A drop-in replacement for Python's datetime with timezone-aware objects by default and a friendlier API.
fake-useragent
Up-to-date user-agent string faker backed by a real-world browser usage database, bundled offline.
fpdf2
A pure-Python library for generating and manipulating PDF documents, with text, images, tables, barcodes, SVG, and digital signing built in.
ramda
A practical functional programming library for JavaScript with automatic currying and immutable, side-effect-free functions.
