All 305,250 crates, alphabetically

aHJ 212 ASCII protocol: framing, parsing, CRC, and builders.599Apache-2.0EncodingParser implementations a-botAsynchronous FRC Library4,576BSD-3-Clause a-flagsPrint LGBTQIA+ flags in your terminal4,407GPL-3.0Command line utilities a-gpta CLI tool to generate and pretty-print code snippets from ChatGPT35,366MIT a-halfAn implementation of half-precision floating-point type2,254MIT/BSD-2-Clause a-holeA declarative whitelist for attention.44MIT OR Apache-2.0Command line utilities A-MazedApp to generate mazes in terminal2,357MIT a-mutexAn abstraction for an asynchronous mutex. Also provides popular implementations.5,002MIT a-puzzle-a-dayGenerate and browse all solutions to A-Puzzle-A-Day3,361GPL-2.0-onlyCommand line utilitiesGames a-rangeWrite quick and explict ranges in Rust2,614Apache-2.0 OR MIT a-rs-jsonrpcA battery-included JSON-RPC framework for Rust31MIT a-rs-jsonrpc-macrosA battery-included JSON-RPC framework for Rust211MIT a-sixelA small sixel + palette selection + dithering library.3,965MIT OR Apache-2.0 a-starThis library provides a generic a-star search algorithm.23MIT a-star_traitbasedImplemetaion of A* useful for stuct, based on train implementation6,190MITAlgorithms a-terminal-multiplexerA lightweight custom terminal workspace multiplexer with center-point geometric pane switching.47MIT OR Apache-2.0Command line utilitiesDevelopment tools a-treeA dynamic data structure for efficiently indexing arbitrary boolean expressions7,108MIT OR Apache-2.0Data structures a0generate structs and their values from external data4,915MIT a0b62b8eeb5f9247747eNew library76Apache-2.0 a0kzgZKG polinomial commitments playground3,135MIT/Apache-2.0 a1A package for converting to and from A1 spreadsheet notation3,190MIT a1-aiA1 — The cryptographic identity and authorization layer that turns anonymous AI agents into accountable, verifiable entities. One…44MIT OR Apache-2.0AuthenticationCryptography a1-identityJWT/OIDC, OAuth2, and SPIFFE identity bridging for A1 — bind enterprise identities to Ed25519 delegation keys16MIT OR Apache-2.0 a10This library is meant as a low-level library safely exposing different OS's abilities to perform non-blocking I/O.22,325MITAsynchronous a11y无障碍（ACCESSIBILITY,A11Y,辅助功能）16,172Apache-2.0 a11ywatch_cliA11yWatch web accessibility CLI.431,310MITAccessibilityCommand line utilities a121-rsRust driver for the Acconeer A121 radar sensor7,203MITEmbedded developmentNo standard library a121-sysRaw bindings to the A121 radar sensor C SDK12,642MITEmbedded developmentNo standard library a14_cargo_ioA fun game where you guess what number the computer has chosen.1,175MIT OR Apache-2.0 a1800_codecA clean room implementation of the GeneralPlus A1800 audio codec36Apache-2.0CompressionEncoding a1_notationA package for converting to and from A1 spreadsheet notation24,621MIT a1qTerminal based messenger695MIT OR Apache-2.0 a2A native, asynchronous Apple push notification client225,190MIT a2-memory-mapDatabase of Apple II memory addresses2,607MIT a20A20 in rust1,841MIT a2aA2A (Agent2Agent) Protocol - An open standard for enabling communication and interoperability between AI agent systems961Apache-2.0API bindingsNetwork programming a2a-agentsFramework for building A2A Protocol agents with declarative configuration143MITAPI bindingsNetwork programming a2a-agents-commonCommon utilities for building A2A Protocol agents148MITAPI bindingsText processing a2a-aoRust SDK for the Agent-to-Agent (A2A) protocol — the open standard for agent interoperability (by AgentOven)571Apache-2.0API bindingsNetwork programming a2a-ap2AP2 (Agent Payments Protocol) extension for the A2A Protocol179MITAPI bindingsNetwork programming a2a-cliStandalone A2A CLI client212Apache-2.0 a2a-clientA2A Protocol Client - HTTP client for calling remote A2A agents4,211MIT a2a-client-lfA2A v1 async client with protocol binding factory17,626Apache-2.0 a2a-coreCore types for the A2A RC 1.0 agent-to-agent protocol18Apache-2.0Data structuresEncoding a2a-generatedA2A-RS integration code generated from RDF ontology by ggen12MITDevelopment toolsNetwork programming a2a-grpcA2A v1 gRPC protocol binding for client and server2,803Apache-2.0 a2a-lfA2A v1 protocol types and core definitions22,654Apache-2.0 a2a-mcpBidirectional integration between A2A Protocol and Model Context Protocol (MCP)97MITAPI bindingsNetwork programming a2a-pbA2A v1 protobuf-generated types and conversion layer21,643Apache-2.0 a2a-protocol-clientAgent2Agent (A2A) protocol v1.0 — HTTP client (hyper-backed)736Apache-2.0Network programmingWeb programming a2a-protocol-sdkAgent2Agent (A2A) protocol v1.0 — convenience umbrella re-export crate627Apache-2.0API bindingsNetwork programming a2a-protocol-serverAgent2Agent (A2A) protocol v1.0 — server framework (hyper-backed)784Apache-2.0Network programmingWeb programming a2a-protocol-typesAgent2Agent (A2A) protocol v1.0 — pure data types, serde only, no I/O9,936Apache-2.0API bindings a2a-rsRust implementation of the Agent-to-Agent (A2A) Protocol9,040MITAPI bindingsNetwork programming a2a-rs-clientA2A RC 1.0 client library for agent communication754Apache-2.0Network programmingWeb programming a2a-rs-coreCore types for the A2A RC 1.0 agent-to-agent protocol6,102Apache-2.0Data structuresEncoding a2a-rs-serverGeneric A2A RC 1.0 JSON-RPC server framework1,795Apache-2.0Network programmingWeb programming a2a-rustRust SDK for the A2A (Agent-to-Agent) protocol28Apache-2.0 OR MITAPI bindingsWeb programming a2a-sdkUnofficial Google A2A SDK. Currently supports v0.3.0 of the specification.2,371MIT a2a-server-lfA2A v1 async server framework14,633Apache-2.0 a2a-server-rustMinimal Rust A2A server agent20MIT a2a-server-rust-azureMinimal Rust A2A server agent17MIT a2a-server-rust-lightsailMinimal Rust A2A server agent16MIT a2a-slimrpcA2A v1 SLIMRPC protocol binding for client and server672Apache-2.0 a2a-swap-cliA2A-Swap CLI — command-line interface for the A2A-Swap agent-native AMM on Solana177MITCommand line utilitiesCryptography::Cryptocurrencies a2a-swap-sdkA2A-Swap Rust SDK — agent-native constant-product AMM client for Solana67MITCryptography::Cryptocurrencies a2a-typesA2A Protocol Types7,274MIT a2a-web-clientGeneric web client library for building A2A agent frontends234MITAPI bindingsWeb programming a2a_app_portsApplication layer ports for A2A servers (clean architecture)232Apache-2.0 a2a_http_clientA2A HTTP client - WASM default, native testing support224Apache-2.0 a2a_http_serverA2A HTTP server - WASM default, native testing support112Apache-2.0 a2a_protocol_corePure A2A (Agent-to-Agent) protocol domain logic - WASM optimized394Apache-2.0 a2acliCommand-line client for the Agent-to-Agent (A2A) protocol21MITAPI bindingsCommand line utilities a2alRust client for a2al: spawn a2ald and call its REST API21MPL-2.0 a2anyPlaceholder owned by the a2any team15MIT/Apache-2.0 a2c-smcpA2C-SMCP Rust SDK - Agent, Computer, and Server implementation339MITDevelopment toolsNetwork programming a2dA 2D graphics library20,880Apache-2.0 a2fAnalysis to Fake - Asynchronous timestamp-bonded cryptography protocol72MIT OR Apache-2.0 a2f-elAnalysis to Fake - EL is a load-reduced version of A2F. It removes AES-256-GCM and uses only chacha20poly.143Apache-2.0 a2f-utilsUtility functions for A2F protocol - X25519 key exchange17Apache-2.0 a2fuseMount and maintain Apple II ProDOS disk images52MIT a2httpcSmall and lightweight HTTP client671MPL-2.0Network programmingWeb programming a2kitRetro disk image and language utility58,520MIT a2kit_macroderivable traits for a2kit5,912MIT a2kit_macro_derivederive macros for a2kit6,510MIT a2lfileread, modify and write a2l files133,660MIT OR Apache-2.0Parser implementations a2lmacrosprovides macros in support of the a2lfile crate118,101MIT OR Apache-2.0 a2mlParser and renderer for A2ML (Attested Markup Language)23MPL-2.0Data structuresParser implementations a2nativeNative desktop UI renderer for AI agents — one JSON in, one native window, one JSON out16Apache-2.0Command line utilitiesGUI a2sRust implementation of Source A2S query39,200MIT a2squeryA simple CLI tool for querying Source Dedicated Servers (A2S_INFO)1,296MITCommand line utilitiesGames a2uiA2UI (Agent to UI) — render JSON streaming UIs authored by AI agents (ratatui + Slint + egui + Bevy + Iced + Dioxus backends)108MIT a2ui-baseFramework-agnostic base for A2UI (Agent to UI): protocol, models, and catalog362MIT a2ui-bevyBevy ECS UI backend for A2UI (Agent to UI)83MIT a2ui-bevy-galleryA2UI gallery — browse and render the sample specs in a Bevy window47MIT a2ui-coreCore logic for the A2UI protocol: traits, negotiation, validation, prompt building29MITAPI bindingsData structures a2ui-dioxusDioxus reactive WebView GUI backend for A2UI (Agent to UI)80MIT a2ui-dioxus-galleryA2UI gallery — browse and render the sample specs in a Dioxus WebView window43MIT a2ui-eguiegui immediate-mode GUI backend for A2UI (Agent to UI)84MIT a2ui-egui-galleryA2UI gallery — browse and render the sample specs in an egui window48MIT a2ui-galleryA2UI gallery — browse and render the sample specs (ratatui backend)165MIT a2ui-gpuiGPUI (Zed) + gpui-component GUI backend for A2UI (Agent to UI)23MIT a2ui-gpui-galleryA2UI gallery — browse and render the sample specs in a GPUI window15MIT a2ui-icedIced Elm-architecture GUI backend for A2UI (Agent to UI)86MIT a2ui-iced-galleryA2UI gallery — browse and render the sample specs in an Iced window31MIT a2ui-imageA2UI image source resolution (http / data: / file://) and raster decode, shared by every UI backend.30MIT a2ui-protocolAgent-to-UI protocol in Rust — define how AI agents communicate with user interfaces, render components, handle events18MIT OR Apache-2.0 a2ui-slintSlint native-GUI backend for A2UI (Agent to UI)104MIT a2ui-slint-galleryA2UI gallery — browse and render the sample specs in a Slint window62MIT a2ui-tuiratatui terminal backend for A2UI (Agent to UI)273MIT a2ui-typesTyped data models for the A2UI protocol (v0.8 & v0.9)93MITAPI bindingsData structures a2ui-validationJSON Schema validation engine for A2UI protocol messages92MITAPI bindingsData structures A2VConverterAudioVideoConverter is a Rust library that provides functionality to convert between audio and video files using the FFmpeg…4,105MIT a2xA converter from ALFA to XACML policy language.254GPL-3.0-or-laterCommand line utilitiesCompilers a2x-derivea2x's derive macro269GPL-3.0-or-laterCommand line utilitiesCompilers a3a3 tools.2,295Apache-2.0AccessibilityConfiguration a38Placeholder1,836MIT a3mo_libArma3 Mod Organizer libary. Provides functions for CLI Client and GUI5,513MIT a3sa3s — A3S coding agent CLI; `a3s code` launches the interactive TUI587MITCommand line utilities a3s-aclParser and generator for the A3S Agent Configuration Language5,412MIT a3s-ahpAgent Harness Protocol v2.4 — Universal, transport-agnostic protocol for supervising autonomous AI agents1,514MIT a3s-bootAdapter-first modular Rust web framework for A3S inspired by Nest.js1,775MITAsynchronousWeb programming a3s-boot-macrosAttribute macros for a3s-boot690MITAsynchronousWeb programming a3s-box-coreCore types, config, and error handling for A3S Box MicroVM runtime963MIT a3s-box-netproxymacOS userspace network proxy for A3S Box libkrun VMs435MIT a3s-box-runtimeMicroVM runtime engine — VM lifecycle, OCI images, attestation, networking760MIT a3s-box-sdkRust SDK for a3s-box direct runtime-backed management APIs.520MIT a3s-code-cliA3S Code CLI - Interactive AI coding agent in the terminal32MIT a3s-code-coreA3S Code Core - Embeddable AI agent library with tool execution2,722MIT a3s-commonShared types for A3S: privacy classification, tool definitions, transport protocol6,223MIT a3s-cronCron scheduling library for A3S with natural language support281MITAsynchronousDevelopment tools a3s-deep-researchEvidence-first, domain-agnostic deep research engine for A3S86MITAsynchronousText processing a3s-eventPluggable event subscription, dispatch, and persistence for the A3S ecosystem1,159MITAsynchronousNetwork programming a3s-flowDurable workflow engine and Rust SDK for A3S1,354MITAsynchronousDevelopment tools a3s-gatewayA3S Gateway - AI-native API gateway with reverse proxy, routing, and agent orchestration508MITNetwork programmingWeb programming::HTTP server a3s-laneLane-based priority command queue for async task scheduling with reliability, scalability, and observability features4,440MITAsynchronousConcurrency a3s-libkrun-sysFFI bindings to libkrun with Windows WHPX backend support852MITAPI bindingsOperating systems::Windows APIs a3s-memoryA3S Memory - Pluggable memory storage for AI agents4,003MIT a3s-powerA3S Power — Privacy-preserving LLM inference for TEE environments257MITWeb programming::HTTP server a3s-runtimeProvider-neutral execution contract and client for A3S runtimes20MIT a3s-searchExtensible web search library and CLI with native AnySearch and Tavily providers5,523MIT a3s-sentryTiered (L1 rules / L2 LLM / L3 agent) runtime security control for AI agents, built on a3s-observer.76MIT a3s-tuiTEA (The Elm Architecture) framework for terminal user interfaces870MITAsynchronousCommand-line interface a3s-updaterSelf-update library for A3S CLI binaries via GitHub Releases6,269MIT a3s-use-browserTyped browser rendering and session contracts for A3S Use992MIT a3s-use-coreShared typed contracts for A3S Use domains1,177MIT a3s-use-extensionACL manifest and native surface contracts for A3S Use extensions374MIT a3s-use-ocrTyped built-in optical character recognition for A3S Use48MIT a4A forth-inspired, bytecode-compiled scripting language for Anachro Powerbus5,462MIT OR Apache-2.0 a4-cliCLI tool for generating TypeScript SDKs from Arete stream specifications271non-standardCommand line utilitiesDevelopment tools a4-coreA forth-inspired, bytecode-compiled scripting language for Anachro Powerbus4,435MIT OR Apache-2.0Embedded developmentNo standard library a5High-performance Rust implementation of the A5 hierarchical spatial indexing system5,779Apache-2.0AlgorithmsData structures a608_embeddedA no_std Rust library for interfacing with fingerprint sensors (R503, R307, AS608, ZFM-20) on embedded systems via UART40MITEmbedded developmentHardware support a653rsArinc653 abstraction library for hypervisor independent partition programming20,076MIT OR Apache-2.0AerospaceAPI bindings a653rs-linuxa653rs partition library for a653rs-linux hypervisor4,830MIT OR Apache-2.0Aerospace a653rs-linux-coreCore Library for a653rs-linux hypervisor and partition library4,012MIT OR Apache-2.0Aerospace a653rs-postcardExtension traits for sending types via a653rs channels using postcard3,102MIT OR Apache-2.0AerospaceEmbedded development a653rs-xnga653rs partition library for xng hypervisor2,102MIT OR Apache-2.0AerospaceEmbedded development a653rs_macrosMacros implementation for a653rs14,880MIT OR Apache-2.0 a7105Rust embedded-hal driver for the A7105 2.4GHz FSK/GFSK Transceiver2,130MIT OR Apache-2.0Embedded developmentHardware support a76xxPure Rust `embedded-io-async` and `embedded-hal` based driver for SIMCom `a76xx` family of modems.23MIT OR Apache-2.0Hardware supportNo standard library a793556702A very simple crate to test publishing to crates.io.6,942MIT a800xl-utilsmisc utilities for mos-a800xl-none target (Atari 800XL/XE)9,172MIT OR Apache-2.0 a8da96aa9ee5ce956b7069f92a4ca762efc75133A crate for SASL authentication. Currently only does the client side.3,912MPL-2.0 a8eArticulate (a8e): The sovereign AI operator for your terminal.151Apache-2.0 a8e-acpArticulate (a8e): The sovereign AI operator for your terminal.282Apache-2.0 a8e-coreArticulate (a8e): The sovereign AI operator for your terminal.475Apache-2.0 a8e-mcpArticulate (a8e): The sovereign AI operator for your terminal.555Apache-2.0 a8e-serverArticulate (a8e): The sovereign AI operator for your terminal.163Apache-2.0 a8e-testArticulate (a8e): The sovereign AI operator for your terminal.123Apache-2.0 a8e-test-supportArticulate (a8e): The sovereign AI operator for your terminal.326Apache-2.0 a8mini-camera-rsA8 Mini Camera Controller5,266MIT a9-cliCLI for installing and managing a9 tools from ars-vivendi75MIT a9-lintAn opinionated Rust style linter configurable via Cargo.toml workspace metadata340MITDevelopment toolsDevelopment tools::Cargo plugins a9-prettypleaseA minimal `syn` syntax tree pretty-printer (fork of prettyplease with enhanced blank-line heuristics)352MIT OR Apache-2.0Development tools a9n-typesCommon, architecture-independent type definitions for the A9N Microkernel ecosystem, including capabilities, message formats,…156MIT a9n_abiABI definitions for the A9N Microkernel, including kernel call numbers, capability operation types, message register layouts, and…83MIT a_add_b这是一个两数相加的方法1,456MIT a_art颜色混合74MIT OR Apache-2.0 a_block_chainA-Block Chain is a distributed blockchain store with a dual double entry (DDE) data structure.11,330GPL-3.0 a_chata asynchronous chat server1,856MIT OR Apache-2.0 a_exampleAn example5,208MIT a_project_docsWorkspace rustdoc landing crate for Smawaco25MIT a_r_c_h_e_r_yTEMPORARY CRATE5,128MPL-2.0ConcurrencyMemory management a_rusty_cliA simple CLI framework written in Rust2,101MIT aaUtils609GPL-2.0 aa-authHTTP authentication and authorization framework for Agent Assembly — API keys, JWTs, scopes, rate limiting, and the…91Apache-2.0 aa-cacheIn-process L1 cache wrapper (DashMap + TTL + stampede protection) for the Agent Assembly storage traits193Apache-2.0 aa-cliaasm — command-line tool for Agent Assembly203Apache-2.0 aa-colourAdd some colours to your amino acids.2,085Apache-2.0Science aa-corePure domain logic for Agent Assembly — no_std compatible608Apache-2.0 aa-ebpfeBPF-based kernel-level monitoring hooks for Agent Assembly374Apache-2.0 aa-ebpf-commonShared no_std types between eBPF kernel probes and userspace loader420Apache-2.0 aa-gatewayControl plane — policy enforcement engine and agent registry for Agent Assembly244Apache-2.0 aa-nameBasic enum for amino acid names.3,083MIT/Apache-2.0Science aa-protoGenerated protobuf/gRPC types for Agent Assembly (prost + tonic)386Apache-2.0 aa-proxySidecar traffic interception proxy for Agent Assembly254Apache-2.0 aa-regexUtility macros to build regular expression matching protein sequences.10,918Apache-2.0Science aa-runtimeTokio async runtime wrapper and lifecycle management for Agent Assembly338Apache-2.0 aa-sandboxWebAssembly/WASI sandbox runtime for Agent Assembly tool execution249Apache-2.0