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

84Health
Library PyPI

Cucumber Expressions

A human-readable alternative to regular expressions for matching Gherkin step text

200
MIT
Used by 1
42Health
Library PyPI

SQLAlchemy-JSON

Mutation-tracked JSON column types for SQLAlchemy, including deeply nested changes.

195
Other
Used by 1
54Health
Library PyPI

python-zstd

Simple, fast Python bindings for Facebook's Zstandard compression library

188
Other
Used by 1
46Health
Library PyPI

tld

Extract the top-level domain (TLD), domain, and subdomain from any URL

187
Other
Used by 1
74Health
Library PyPI

pybase64

Fast Base64 encoding and decoding for Python, powered by a SIMD-accelerated C extension with an automatic pure-Python fallback.

182
Other
Used by 1
80Health
Library PyPI

Azure Functions Python Library

The Python programming model for Azure Functions: triggers, bindings, and typed request/response objects.

179
MIT
Used by 1
43Health
Library PyPI

pyjson5

A fast JSON5 serializer and parser for Python 3, implemented in Cython with a C++ core.

179
Apache 2.0
Used by 1
36Health
Library PyPI

webcolors

A pure-Python library for converting and normalizing HTML/CSS color names, hex codes, and RGB values

175
BSD 3
Used by 1
31Health
Library PyPI

confusable_homoglyphs

Detect dangerous Unicode homoglyphs and mixed-script strings to stop impersonation attacks

166
MIT
Used by 1
68Health
Library PyPI

svix-ksuid

Pure-Python KSUID (K-sortable unique ID) implementation from Svix

160
MIT
Used by 1
57Health
Library PyPI

brotlicffi

Python CFFI bindings for Google's Brotli compression library, providing an API-compatible fallback for PyPy and other non-CPython runtimes.

154
MIT
Used by 1
56Health
Library PyPI

pydyf

A low-level PDF generator for Python based on the PDF 1.7 specification.

153
BSD 3
Used by 1
67Health
Library PyPI

installer

A low-level Python library for installing packages from wheel distributions.

148
MIT
Used by 1
36Health
Library PyPI

SecretStorage

Python bindings to the Freedesktop.org Secret Service D-Bus API for secure password storage on Linux.

148
BSD 3
Used by 1
39Health
Library PyPI

sqlean.py

A drop-in replacement for Python's sqlite3 module, bundled with sqlean's SQL extensions.

145
Other
Used by 1
36Health
Library PyPI

OpenAPI Pydantic

Type-safe OpenAPI 3.0 and 3.1 schema models for Python, built on Pydantic 1.8+ and 2.x for validated construction and parsing.

123
MIT
Used by 1
86Health
Library PyPI

coredis

Fully-typed async Redis client for Python with native cluster, sentinel, and structured-concurrency support via anyio.

117
MIT
Used by 1
71Health
Library PyPI

python-sdk

Vendor-agnostic feature flagging API for Python, letting you swap flag providers without touching call sites.

111
Apache 2.0
Used by 1
68Health
Library PyPI

aiologic

Async-aware and thread-aware locking primitives for Python concurrency

93
Other
Used by 1
39Health
Library PyPI

packageurl-python

Python library to parse and build Package URLs (purl).

91
MIT
Used by 1
30Health
Library PyPI

html2docx

Convert HTML strings and files into Word DOCX documents from Python.

89
MIT
Used by 1
53Health
Library Cargo

hannoy

A production-ready, key-value-backed HNSW vector search implementation in Rust using LMDB.

87
MIT
Used by 1
58Health
Library PyPI

httpx-socks

SOCKS4, SOCKS5, and HTTP CONNECT proxy transports for the httpx client.

87
Apache 2.0
Used by 1
67Health
Library PyPI

PyExasol

Official low-overhead Python driver for the Exasol database with fast HTTP transport.

81
MIT
Used by 1

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