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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PyYAML
A full-featured YAML parser and emitter for Python, with C-accelerated bindings
superjson
Serialize JavaScript to a superset of JSON that keeps Dates, Maps, Sets, BigInts, and more intact.
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.
kin-openapi
A Go library for parsing, validating, converting, and working with OpenAPI 2.0, 3.0, 3.1, and 3.2 documents.
toml
A pure-Python library for parsing and creating TOML documents, validated against the official TOML test suite.
@xmldom/xmldom
A pure JavaScript, W3C-standard DOMParser and XMLSerializer for parsing and building XML/HTML documents
go-toml
The original Go library for loading, querying, and marshaling TOML documents, now superseded by go-toml v2.
serde_with
Custom de/serialization helpers for Rust's serde, via the with and serde_as annotations
feedparser
Parses RSS, Atom, RDF, CDF, and JSON feeds into one normalized Python dictionary.
PhpSpreadsheet
Read, write, and manipulate Excel, CSV, and ODS spreadsheet files in pure PHP with no external office suite required.
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.
json-2-csv
Converts arrays of JSON documents to RFC 4180 compliant CSV and back, with native support for nested sub-documents.
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.
