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

Kind
Library4824 SDK549 Tool342 Framework214
Category
Utilities Ids Helpers1293 Serialization Data Formats487 UI Component Libraries383 Cli Terminal323 Authentication Authorization289 Cryptography Hashing259 Web Frameworks API Servers246 Build Tools Bundlers227 Image Media Processing213 Cloud Sdks200 Database Drivers Clients200 Async Concurrency Runtimes194
Tags4
React667 Python638 Javascript591 Rust485 Typescript408 Hacktoberfest308 PHP304 Nodejs280 Parser224 JSON205 Laravel203 Go192 Java18 Algorithm12 Fields2
Sort:Used by Most Apps
Used by Most Apps Health Score Most Stars A-Z
Showing 561 of 5929 packages
Fields Algorithm Java Javascript Clear all
33Health
Library npm

@connectrpc/validate

A Connect interceptor that validates RPC requests and responses using Protobuf constraints and CEL expressions.

14
Apache 2.0
Used by 1
47Health
Library PyPI

quickjs-rs

Sandboxed JavaScript and TypeScript execution for Python, running QuickJS inside a WebAssembly sandbox.

11
MIT
Used by 1
26Health
Library npm

@tinyhttp/logger

Minimal and flexible HTTP request logger middleware for tinyhttp and Node.js.

10
MIT
Used by 1
58Health
SDK npm

node-client-sdk

LaunchDarkly's client-side feature-flag SDK for single-user Node.js apps, now superseded by the scoped @launchdarkly/node-client-sdk package.

9
Apache 2.0
Used by 1
40Health
Library npm

@datadog/native-metrics

A native Node.js addon that collects CPU, V8 heap, garbage-collection, and event-loop metrics directly from libuv and V8 internals.

8
Apache 2.0
Used by 1
23Health
Library npm

estree-util-is-identifier-name

A tiny estree utility that checks whether a string or code point can be a valid ECMAScript identifier name.

3
MIT
Used by 1
87Health
Tool npm

Repomix

Packs an entire repository into a single AI-friendly file, complete with token counts, secret scanning, and an MCP server for direct AI assistant access.

28,391
MIT
49Health
Library npm

Material Components for Web

Modular and customizable Material Design UI components for the web.

17,051
MIT
54Health
Library npm

selectize.js

A jQuery-based custom select UI control with autocomplete, tagging, and keyboard-driven multi-select for forms.

13,020
Apache 2.0

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