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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prosemirror-model
The persistent document model and schema system at the core of the ProseMirror rich-text editor.
hyper-util
Batteries-included utilities for hyper: connection pooling, Tokio I/O adapters, and client/server helpers
posthog
The official PostHog SDK for sending events, feature flags, and session data from any Python application.
gRPC Python (grpcio)
The Python runtime for gRPC, Google's high-performance, cross-language RPC framework, built on the shared C-core from the grpc/grpc monorepo.
LangGraph
A low-level orchestration framework for building stateful, multi-actor LLM agents as graphs
Ink
React for CLIs — build and test interactive command-line apps using declarative, Flexbox-based components instead of manual stdout writes.
React Helmet
A reusable React component for managing changes to the document head
Effect
A TypeScript library and ecosystem for building robust, type-safe, concurrent applications with a full functional effect system
vercel_runtime
The official Rust runtime for writing and deploying serverless functions on Vercel.
React Color
A collection of color-picker components styled after Sketch, Photoshop, Chrome, GitHub, Twitter, and more
morgan
Battle-tested HTTP request logger middleware for Node.js and Express.
go-git
A highly extensible pure-Go implementation of Git, exposing both plumbing and porcelain operations behind a pluggable storage interface.
ssh2
Pure-JavaScript SSH2 client and server library for Node.js, with SFTP, exec, shell, and port forwarding support.
goldmark
A CommonMark-compliant Markdown parser and renderer for Go, built around a walkable AST and pluggable extensions.
Collision
Beautiful command-line error reporting for PHP apps and test suites
notify
Cross-platform filesystem notification library for Rust
iconv-lite
Pure JavaScript character encoding conversion supporting hundreds of legacy and Unicode encodings, with streaming for Node.js and browsers.
itertools
Extra iterator adaptors, methods, and macros extending Rust's standard Iterator trait
otp
A Go library for generating and validating TOTP and HOTP one-time passcodes, compatible with Google Authenticator.
cachetools
In-memory memoizing cache collections and decorators for Python, beyond the standard library's lru_cache
re-resizable
A dependency-free React component that adds drag-to-resize handles, grid snapping, and aspect-ratio locking to any element.
React-Resizable
Simple React component for resizing elements with drag handles
change-case
Transform strings between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more
Pygments
Generic syntax highlighter for Python supporting over 500 languages and formats
