Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
All Packages
Category
Sort:Used by Most Apps
Playwright
Cross-browser end-to-end web testing and browser automation with a single API for Chromium, Firefox, and WebKit.
React Testing Library
Simple and complete React DOM testing utilities that encourage good testing practices.
jest-dom
Custom Jest matchers for asserting on the state of the DOM in your tests.
jest
Delightful JavaScript testing with zero-config setup, snapshots, mocking, and coverage
user-event
Simulates the full sequence of real browser events so Testing Library tests behave the way an actual user does.
serde_json
The de facto standard JSON library for Rust, built on the Serde serialization framework
serde
A generic framework for serializing and deserializing Rust data structures efficiently and safely.
testify
The essential Go toolkit for assertions, mocks, and structured test suites.
pytest
The Python testing framework that makes writing small tests easy and scales to complex functional test suites.
Tokio
The async runtime powering most of Rust's networked, concurrent, and I/O-bound applications.
DOM Testing Library
Simple, framework-agnostic DOM query utilities that test your UI the way real users interact with it.
Storybook
The industry-standard workshop for building, documenting, and testing UI components in isolation, across every major frontend framework.
reqwest
An ergonomic, batteries-included HTTP client for Rust, with async and blocking APIs.
undici
A fast, spec-compliant HTTP/1.1 client for Node.js, built from scratch with zero runtime dependencies
tempfile
A secure, cross-platform Rust library for temporary files and directories that clean up automatically on drop.
base64
Correct, fast, and configurable base64 encoding and decoding for Rust, with pluggable alphabets and padding.
regex
Rust's finite-automata regex engine with guaranteed linear-time matching and no catastrophic backtracking.
Chrono
Timezone-aware date and time handling for Rust, with correct calendar operations and flexible strftime-style formatting.
MSW (Mock Service Worker)
Seamless REST and GraphQL API mocking for browser and Node.js
Clap
The most widely used command-line argument parser for Rust, with both derive and builder APIs.
uuid
Generate and parse UUIDs in Rust across every standardized version, from v1 to v8.
SWC
Rust-based JavaScript/TypeScript compiler, a drop-in super-fast alternative to Babel
sha2
Pure Rust implementation of the SHA-2 hash function family (SHA-224/256/384/512) with hardware-accelerated backends.
tracing
Structured, application-level diagnostics for async Rust programs, built around scoped spans and events.
