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

92Health
Library npm

AI SDK

Provider-agnostic TypeScript toolkit for building AI apps and agents with any LLM.

26,733
Apache 2.0
Used by 105
90Health
Library npm

Prisma Client

Auto-generated, type-safe database client for Node.js and TypeScript.

47,610
Apache 2.0
Used by 46
36Health
Library npm

use-stick-to-bottom

Zero-dependency React hook and component that keeps AI chat scrolled to the bottom as content streams in.

776
MIT
Used by 27
96Health
SDK PyPI

Slack SDK for Python

The official Python SDK for building apps, bots, and integrations on the Slack Platform.

4,012
MIT
Used by 13
42Health
Library npm

GSAP

The industry-standard JavaScript animation library for tweening CSS, SVG, canvas, and UI with rock-solid cross-browser reliability.

28,405
Other
Used by 11
84Health
Framework npm

Chat SDK

A unified TypeScript SDK for building chat bots and AI agents across every major messaging platform

2,362
MIT
Used by 10
55Health
SDK npm

msgraph-sdk-javascript

Official Microsoft Graph JavaScript SDK for calling the Graph API from Node.js and the browser.

833
MIT
Used by 8
94Health
Library npm

gridstack.js

A dependency-free TypeScript library for building draggable, resizable, responsive dashboard grid layouts in the browser.

9,115
MIT
Used by 7
89Health
Library npm

assistant-ui

Composable React primitives and a headless runtime for building production-grade AI chat interfaces.

12,141
MIT
Used by 6
97Health
SDK PyPI

python-telegram-bot

A fully async, type-hinted Python wrapper for the Telegram Bot API with a batteries-included framework for building bots.

29,465
Other
Used by 4
86Health
SDK npm

TanStack AI

Type-safe, provider-agnostic TypeScript AI SDK for streaming chat, tool calling, agents, and multimodal apps.

3,108
MIT
Used by 4
34Health
SDK npm

sns-payload-validator

Verifies AWS SNS message signatures for HTTP/S and Lambda payloads.

13
MIT
Used by 3
87Health
SDK npm

node-telegram-bot-api

A runtime-agnostic, fully-typed TypeScript client for the Telegram Bot API, with middleware routing, sessions, and zero dependencies.

9,203
MIT
Used by 2
70Health
Library npm

lightGallery

A modular, responsive lightbox gallery plugin for images and video, with official React, Vue, and Angular wrappers.

7,053
GPL 3.0
Used by 1
49Health
Library npm

jsts

JavaScript port of the Java JTS Topology Suite for spatial predicates, geometry operations, and OGC Simple Features processing.

1,562
Other
Used by 1
94Health
Framework PyPI

Bolt for Python

Slack's official Python framework for building Slack apps fast, with routing, middleware, and Socket Mode across many web stacks.

1,326
MIT
Used by 1
90Health
SDK PyPI

rasa-sdk

Python SDK for building the custom action server that connects a Rasa chatbot to your own APIs and business logic.

318
Apache 2.0
Used by 1
41Health
SDK PyPI

fbmessenger

A Python SDK for building Facebook Messenger bots on top of the Send API, Messenger Profile, and webhook event dispatch.

112
Apache 2.0
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

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