PyPI · npm96Exceptionalhealth index
Python★ 7,238↓ 120M/moSep 16, 2026
crates.io95Exceptionalhealth index

copper-project/copper-rsCopper is an operating system for robots - build, run, and replay your entire robot deterministically.
Rust★ 1,488↓ 26.7K/moSep 13, 2026
crates.io94Exceptionalhealth index

alloy-rs/coreHigh-performance, well-tested & documented core libraries for Ethereum, in Rust
Rust★ 965↓ 13.8M/moSep 9, 2026
crates.io94Exceptionalhealth index
Rust★ 1,074↓ 349M/moSep 19, 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
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.io93Exceptionalhealth index

tkhq/qosQuorumOS is a computation layer for running applications inside Trusted Execution Environments (TEEs)
Rust★ 119↓ 127.7K/moSep 9, 2026
crates.io91Excellenthealth index

bourumir-wyngs/serde-saphyrA strongly typed, comment-supporting YAML deserializer that deserializes YAML directly into your Rust types without constructing an intermediate tree of “abstract values.”
Rust★ 220↓ 1.6M/moSep 11, 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
crates.io89Excellenthealth index

gungraun/gungraunHigh-precision, one-shot and consistent benchmarking framework/harness for Rust. All Valgrind tools at your fingertips.
Rust · Roff★ 334↓ 815.7K/moOct 20, 2026
crates.io89Excellenthealth index
Rust★ 4,016↓ 6.7M/moSep 18, 2026
PyPI88Excellenthealth index

msgspec/msgspecA fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML
Python · C★ 4,063Aug 27, 2026
npm87Excellenthealth index

JairusSW/json-asMulti-GB/s JSON (de)serialization written in AssemblyScript utilizing elegant SIMD and SWAR algorithms
TypeScript★ 113↓ 29K/moOct 8, 2026
crates.io87Excellenthealth index
Rust★ 173↓ 31K/moSep 14, 2026
crates.io87Excellenthealth index
Rust★ 920↓ 2.1M/moSep 15, 2026
crates.io87Excellenthealth index

tafia/calamineA pure Rust Excel/OpenDocument SpreadSheets file reader: rust on metal sheets
Rust★ 2,413↓ 1.3M/moSep 5, 2026
crates.io86Excellenthealth index
Rust★ 97↓ 11.4K/moSep 15, 2026
PyPI86Excellenthealth index
Python★ 935↓ 37M/moAug 27, 2026
crates.io86Excellenthealth index
Rust★ 185↓ 804.9K/moSep 17, 2026
crates.io84Excellenthealth index
Rust★ 68↓ 2M/moAug 27, 2026
crates.io84Excellenthealth index

emanuele-em/proxelarScriptable local traffic workbench for inspecting, intercepting, replaying, and rewriting HTTP/HTTPS and WebSocket traffic.
Rust★ 1,060↓ 212/moSep 14, 2026
crates.io84Excellenthealth index
Rust★ 5,634↓ 104M/moSep 16, 2026
npm83Excellenthealth index
TypeScript★ 97↓ 4M/moAug 27, 2026
crates.io83Excellenthealth index

majiayu000/jsonrepair-rsRepair broken JSON in Rust — fix quotes, commas, comments, truncation, and 30+ issues from LLM outputs
Rust · Python★ 4↓ 23.9K/moSep 27, 2026
crates.io · npm · PyPI83Excellenthealth index

quartiq/miniconfRust serialize/deserialize/access reflection for trees (no_std, no alloc)
Rust · TypeScript★ 34↓ 7,029/moSep 18, 2026
crates.io83Excellenthealth index
Rust · Shell★ 1↓ 3,083/moOct 17, 2026
npm · crates.io · PyPI81Excellenthealth index

laithalsaadoon/microvms-agentdA verified Rust client stack and in-VM daemon for AWS Lambda MicroVMs: typed trap closures, cost reporting, and a live conformance suite
Rust · Python★ 5↓ 1,640/moSep 25, 2026
crates.io81Excellenthealth index

x52dev/confikComposable multi-source configuration for Rust applications.
Rust★ 46↓ 51K/moOct 6, 2026
crates.io · RubyGems80Excellenthealth index
Rust★ 1,411↓ 77.3M/moSep 16, 2026
crates.io · npm80Excellenthealth index

gpu-cli/openapi-to-rustOpenAPI generator for Rust: typed models, async Reqwest/SSE clients, and Axum server scaffolding for OpenAPI 3.0/3.1.
Rust★ 35↓ 12.6K/moSep 13, 2026