Directory

Open Source Packages

Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.

5929 packages

All Packages

97Health
Tool npm

TypeScript

A strongly typed superset of JavaScript that compiles to clean, portable JavaScript.

111,050
Apache 2.0
Used by 500
95Health
Library npm

@babel/core

The core JavaScript compiler that transforms next-generation syntax into code every browser and runtime can understand.

43,996
MIT
Used by 163
82Health
Tool npm

esbuild

An extremely fast JavaScript and CSS bundler and minifier written in Go.

40,058
MIT
Used by 139
97Health
Tool npm

webpack

A static module bundler that builds a dependency graph of your project's modules and packages them into optimized browser bundles

65,948
MIT
Used by 90
90Health
Tool npm

SWC

Rust-based JavaScript/TypeScript compiler, a drop-in super-fast alternative to Babel

34,191
Apache 2.0
Used by 55
46Health
Tool npm

npm-run-all

A cross-platform CLI that runs multiple npm-scripts in parallel or in sequence, replacing fragile shell operators like && with Windows-safe orchestration.

5,832
MIT
Used by 41
78Health
Tool npm

TypeScript Native Preview

Preview npm build of tsgo, the native Go port of the TypeScript compiler ahead of TypeScript 7.0.

26,194
Apache 2.0
Used by 34
77Health
Library npm

ignore

A pure JavaScript manager, filter, and parser for .gitignore-style rules, built exactly to the gitignore spec.

501
MIT
Used by 29
59Health
Library npm

ts-morph

Navigate and manipulate TypeScript code with a friendlier compiler API wrapper

6,179
MIT
Used by 28
84Health
Tool npm

svgo

A Node.js library and command-line tool that optimizes SVG files by removing redundant markup through a configurable plugin pipeline.

22,669
MIT
Used by 23
94Health
Tool npm

nest-cli

Scaffolds, builds, and serves NestJS applications through schematics-driven code generation and pluggable compiler backends.

2,197
MIT
Used by 19
85Health
Tool npm

openapi-ts

OpenAPI-to-TypeScript code generator producing production-grade SDKs, Zod schemas, and TanStack Query hooks.

5,406
MIT
Used by 14
90Health
Framework Cargo

napi-rs

Build precompiled Node.js add-ons in Rust via Node-API, no node-gyp required

7,939
MIT
Used by 13
91Health
Tool npm

Rspack CLI

The official command-line interface for running Rspack builds, dev servers, and previews.

12,899
MIT
Used by 12
59Health
Tool npm

vue-template-compiler

Precompiles Vue 2 templates into render functions ahead of time, avoiding runtime compilation overhead and CSP restrictions in build tooling.

212,804
MIT
Used by 11
94Health
Tool Cargo

wasm-bindgen

Rust-JavaScript interop toolchain that generates the glue code needed to compile Rust to WebAssembly and call it from JS

9,148
Apache 2.0
Used by 11
88Health
Tool npm

Rsbuild

Rspack-powered build tool that gives web projects fast, zero-config bundling and a rich official plugin ecosystem.

3,378
MIT
Used by 9
43Health
Tool npm

source-map-explorer

Visualizes JavaScript bundle contents by analyzing source maps to reveal exactly which files bloat your minified code.

3,932
Apache 2.0
Used by 8
44Health
Library npm

clean-webpack-plugin

A webpack plugin that automatically removes stale build output before and after every compilation.

1,937
MIT
Used by 7
58Health
Tool npm

Yarn

A fast, reliable, and secure dependency manager for JavaScript projects, caching every download for deterministic, offline-capable installs.

41,478
Other
Used by 5
48Health
Library npm

postcss-prefixwrap

A PostCSS plugin that wraps every CSS rule in a container selector to scope styles safely.

83
MIT
Used by 4
47Health
Library npm

esprima

A high-performance, standard-compliant ECMAScript parser producing ESTree-compatible ASTs for JavaScript tooling.

7,138
Other
Used by 2
90Health
Tool npm

moon

A Rust-based build system and monorepo orchestrator that manages toolchains, tasks, caching, and CI pipelines across the JavaScript, TypeScript, and polyglot ecosystem.

4,100
MIT
Used by 2
87Health
Tool npm

Rslib

An Rsbuild-powered build tool for creating JavaScript and TypeScript libraries with zero-config defaults and flexible multi-format output.

1,034
MIT
Used by 2

Join founders buildingwith open source

Opinionated takes, migration guides, cost-saving tips, and insights from the open source ecosystem.

Subscribe on Substack
Join 750+ subscribers