PyPI · crates.io · Maven +198Exceptionalhealth index

apache/foryA blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.
Java · Python★ 4,519↓ 4,472/moAug 28, 2026
PyPI97Exceptionalhealth index

google/orbaxOrbax provides common checkpointing and persistence utilities for JAX users
Python★ 537↓ 2.8M/moOct 21, 2026
Packagist · Go · Maven +196Exceptionalhealth index
Java · C#★ 3,306↓ 22.7K/moSep 13, 2026
crates.io96Exceptionalhealth index
Rust★ 129↓ 1.7M/moSep 17, 2026
PyPI · npm96Exceptionalhealth index
Python★ 7,238↓ 120M/moSep 16, 2026
npm96Exceptionalhealth index
TypeScript · JavaScript★ 2,450↓ 4.8M/moSep 11, 2026
Packagist · RubyGems · Maven +196Exceptionalhealth index
C++ · C# · C★ 72K↓ 7.8M/moSep 16, 2026
crates.io · npm95Exceptionalhealth index
Rust★ 134↓ 85K/moOct 18, 2026
npm95Exceptionalhealth index

inikulin/parse5HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
TypeScript★ 3,930↓ 767M/moSep 16, 2026
npm95Exceptionalhealth index

medplum/medplumMedplum is a healthcare platform that helps you quickly develop high-quality compliant applications.
TypeScript★ 2,678↓ 887.4K/moSep 16, 2026
NuGet94Exceptionalhealth index
C#★ 934Sep 17, 2026
crates.io94Exceptionalhealth index

alloy-rs/coreHigh-performance, well-tested & documented core libraries for Ethereum, in Rust
Rust★ 965↓ 13.8M/moSep 9, 2026
PyPI · crates.io · npm +194Exceptionalhealth index

foxglove/mcapMCAP is a modular, performant, and serialization-agnostic container file format, useful for pub/sub and robotics applications.
Rust · TypeScript · Python★ 1,116↓ 3.4M/moOct 19, 2026
PyPI · crates.io · npm94Exceptionalhealth index
Rust · Python★ 102↓ 9,278/moOct 17, 2026
PyPI · npm94Exceptionalhealth index

frenck/probatio⚖️ Probatio. A modern, maintained data validation library for Python. Clean-room, MIT-licensed, drop-in reimplementation of voluptuous.
Python★ 21↓ 199.8K/moOct 21, 2026
PyPI94Exceptionalhealth index
Python★ 1,051↓ 49.2M/moSep 10, 2026
PyPI · crates.io93Exceptionalhealth index
Rust · Python★ 305↓ 73.6M/moSep 16, 2026
Maven93Exceptionalhealth index
Java★ 4,397Aug 28, 2026
crates.io93Exceptionalhealth index

facet-rs/facetRust reflection, serialization, deserialization, pretty printing, etc. — the last proc macro you should need
Rust★ 2,587↓ 246.3K/moOct 19, 2026
Go93Exceptionalhealth index

fxamacker/cborCBOR codec (RFC 8949, RFC 8742) with CBOR tags, Go struct tag options (toarray, keyasint, omitempty, omitzero), float64/32/16, big.Int, and fuzz tested.
Go★ 1,089Sep 14, 2026
crates.io93Exceptionalhealth index

jonasbb/serde_withThis crate provides custom de/serialization helpers to use in combination with serde's `with`-annotation and with the improved `serde_as`-annotation.
Rust★ 857↓ 53.4M/moSep 17, 2026
crates.io92Excellenthealth index

anthropics/buffaRust implementation of protobuf with editions support, JSON serialization, and zero-copy views
Rust★ 871↓ 4.1M/moAug 27, 2026
crates.io91Excellenthealth index
Rust★ 888↓ 39M/moSep 18, 2026
Packagist91Excellenthealth index
PHP★ 129↓ 474.7K/moSep 13, 2026
npm91Excellenthealth index
TypeScript★ 729↓ 188M/moSep 9, 2026
PyPI91Excellenthealth index
Python · C · Cython★ 2,102↓ 228M/moSep 9, 2026
crates.io91Excellenthealth index

sebastienrousseau/noyalibA YAML 1.2 parser and serialiser for Rust: zero unsafe, full serde integration, lossless CST editing, JSON Schema validation, 406/406 on the official test suite. Core of a six-crate ecosystem with a CLI, LSP, MCP server, WASM bindings, and a serde_yaml drop-in.
Rust★ 11↓ 263K/moOct 20, 2026
NuGet91Excellenthealth index

udndc/X.PagedListLibrary for easily paging through any IEnumerable/IQueryable in ASP.NET
C#★ 926Oct 22, 2026
PyPI91Excellenthealth index
Python★ 13↓ 5,580/moOct 11, 2026
npm90Excellenthealth index

Cratis/FundamentalsThe shared building blocks beneath the Cratis stack — concepts, serialization, dependency injection, and type discovery for .NET and TypeScript.
C# · TypeScript★ 2↓ 12.5K/moSep 10, 2026