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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django-rest-framework
The most widely-used toolkit for building Web APIs on top of Django, with serializers, viewsets, and a built-in browsable API.
got
Human-friendly and powerful HTTP request library for Node.js, with retries, streams, pagination, and RFC 7234 caching built in.
Azure Identity (Python)
Microsoft Entra ID token authentication for Azure SDK clients in Python
itsdangerous
A small Python toolkit for cryptographically signing data so you can trust it hasn't been tampered with when it comes back from an untrusted client.
aiosqlite
Async/await-friendly wrapper around Python's built-in sqlite3 module for asyncio applications.
croniter
Parses cron schedule strings and iterates the matching datetime values, with DST, second/year fields, and last-weekday support.
FastMCP
The fast, Pythonic framework for building Model Context Protocol servers, clients, and apps
structlog
Structured, typed logging for Python built on plain functions and dictionaries instead of a bespoke logging DSL.
Echo
A minimalist, high-performance Go web framework with a radix-tree router, built-in middleware chain, and first-class HTTP/2 support.
networkx
Python library for creating, manipulating, and analyzing complex networks and graphs.
prometheus-client
The official Python instrumentation library for exposing Prometheus metrics
Slack SDK for Python
The official Python SDK for building apps, bots, and integrations on the Slack Platform.
clickhouse-connect
ClickHouse's official high-performance Python driver, with native Pandas, NumPy, PyArrow, and Superset support
sniffio
A tiny Python library that detects which async framework (trio, asyncio, or curio) your code is currently running under.
E2B
Python SDK for spinning up secure, isolated cloud sandboxes where AI agents can safely run code.
PyMuPDF
A high-performance Python library for extracting, rendering, converting, and manipulating PDF and other document formats.
APScheduler
Python task scheduler with cron, interval, and one-off triggers, backed by pluggable persistent datastores for distributed job scheduling.
@e2b/code-interpreter
JavaScript/TypeScript SDK for running AI-generated code in stateful, isolated E2B cloud sandboxes
GSAP
The industry-standard JavaScript animation library for tweening CSS, SVG, canvas, and UI with rock-solid cross-browser reliability.
PEFT
Hugging Face's library of state-of-the-art parameter-efficient fine-tuning methods for large models.
PyO3
Rust bindings for the Python interpreter, for writing native extensions or embedding Python in Rust.
js-beautify
Reformats and re-indents JavaScript, HTML, and CSS into clean, readable code
pyparsing
Build recursive-descent parsers in Python without a separate grammar file
pluggy
The minimalist, production-ready plugin and hook system that powers pytest, tox, and devpi
