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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tsx
A drop-in replacement for the node CLI that runs TypeScript and ESM files instantly, powered by esbuild.
ts-node
TypeScript execution engine and REPL for Node.js that runs .ts files directly, without a separate compile step.
Tokio
The async runtime powering most of Rust's networked, concurrent, and I/O-bound applications.
tslib
The runtime library that houses TypeScript's compiler helper functions so your emitted code stays small.
tokio-tungstenite
Asynchronous, Tokio-native WebSocket streams built on tungstenite
vercel_runtime
The official Rust runtime for writing and deploying serverless functions on Vercel.
Valibot
Modular, type-safe schema validation library with bundle sizes starting under 1KB
regenerator-runtime
The runtime library that powers Babel-compiled ES6 generator and async/await functions in ES5 environments
Lingui
A readable, 2kb internationalization runtime for JavaScript with ICU MessageFormat and rich-text support.
@e2b/code-interpreter
JavaScript/TypeScript SDK for running AI-generated code in stateful, isolated E2B cloud sandboxes
backoff
Python function decorators that retry calls on exceptions or bad return values, with exponential, fibonacci, or constant backoff and jitter.
Tornado
Python web framework and asynchronous networking library built for high concurrency
next-runtime-env
Populate Next.js environment variables at runtime instead of build time
wazero
Zero-dependency WebAssembly Core 1.0/2.0 runtime for Go, embedding Wasm modules with no CGO via an interpreter or AOT compiler.
bb8
A full-featured async connection pool for Rust, built on Tokio.