Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
All Packages
Category1
Sort:Used by Most Apps
PyYAML
A full-featured YAML parser and emitter for Python, with C-accelerated bindings
Charset Normalizer
A pure-Python universal charset detector that turns text of unknown encoding into clean Unicode.
orjson
A fast, correct, Rust-backed JSON library for Python with native dataclass, datetime, and numpy support
tomli
A lil' TOML parser for Python — fast, spec-compliant, and dependency-free.
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.
feedparser
Parses RSS, Atom, RDF, CDF, and JSON feeds into one normalized Python dictionary.
json_repair
Repair malformed JSON from LLMs, APIs, logs, and user input — a drop-in fallback for json.loads().
msgspec
A fast, zero-cost serialization and validation library for JSON, MessagePack, YAML, and TOML in Python.
python-zstandard
Python bindings for the Zstandard (zstd) compression library, exposing the full C API through a Pythonic, high-performance interface.
jsonpath-ng
A standard-compliant JSONPath implementation for Python with arithmetic operators, AST manipulation, and in-place updates.
types-toml
PEP 561 type stubs that add static typing to the Python toml library
FlatBuffers
Google's memory-efficient, zero-copy serialization library for cross-language data exchange
marshmallow
An ORM/framework-agnostic Python library for converting complex objects to and from native datatypes, with built-in validation.
ujson
Ultra-fast JSON encoder and decoder for Python, written in C
deltalake
Native Rust-powered Python binding for Delta Lake, giving pandas, Polars, and Arrow workflows ACID table reads and writes without a JVM.
dataclasses-json
Encode and decode Python dataclasses to and from JSON with a single decorator or mixin.
python-json-patch
A lightweight Python library for creating and applying JSON Patch (RFC 6902) operations to any JSON-like document.
ormsgpack
A fast Rust-backed MessagePack library for Python with native dataclass, datetime, numpy, and Pydantic support.
asn1crypto
A fast, pure Python library for parsing and serializing ASN.1 structures with a pythonic, high-performance API.
djangorestframework-dataclasses
A dataclasses serializer for Django REST Framework that auto-generates fields from type annotations.
python-frontmatter
A small Python library for loading and parsing text files with YAML, JSON, or TOML front matter.
python-lz4
C-accelerated Python bindings for LZ4, covering the frame, block, and streaming compression formats.
tomli-w
A lil' TOML writer for Python — the write-only counterpart to Tomli, producing spec-compliant TOML v1.0.0 from plain dicts.
dockerfile-parse
A dependency-free Python library for parsing, inspecting, and rewriting Dockerfiles programmatically.
