All 305,250 crates, alphabetically

castilloplaceholder, will be used very soon1,104MIT OR Apache-2.0 castingCastFrom and CastInto traits for generic numeric casting1,215MITNo standard libraryRust patterns casting-cliCast a Persona onto your CLI - AI-driven personalities for command-line tools132MIT OR Apache-2.0Command line utilities castleA dotfiles manager.1,284MIT OR Apache-2.0 castle-coreCastleCore - Core engine for Altenstein (and same projects)14,534MIT castle-game2D destructible terrain strategy game58,667GPL-3.0Games castle_apiCastle API, graph api58,656MIT castle_errorCastle Error, error handling for Castle systems23,277MIT castle_input_cursorCastle Input Cursor69,968MIT castle_macroCastle Macro, macros to make your life easier38,124MIT castle_query_parserCastle Query Parser, parses query string for Castle Query61,605MIT castle_schema_parserCastle Schema Parser59,720MIT castle_shared_parserCastle Shared Parser64,238MIT castle_tokenizerCastle Tokenizer: tokenizer65,282MIT castle_typesall Castle types for Castle_Api44,637MIT castledBest tunnel for development and kubernetes3,431MIT castorContent addressable storage backed by LMDB16,997ISC castra libary for simple casting1,915MIT OR Apache-2.0 castsvgRecord terminal sessions and render them as self-contained animated SVG — a single static binary, no Node or Python runtime.37MITCommand line utilities castwright🎥 Scripted terminal recording.7,767GPL-3.0-or-laterCommand line utilitiesDevelopment tools casualSimple crate for parsing user input.48,057MIT OR Apache-2.0Command-line interfaceRust patterns casual_loggerWhat a bother. I want to logging it without setting it.62,927MITDevelopment tools::Debugging casuariusAnother implementation of the Cassowary linear constraint solving algorithm.3,514MIT / Apache-2.0 casusA simple library containing a handful of event-based async primitives2,114MIT casweeney_crateBasic math operations1,636MIT catJust cat.10,757MIT cat-ascii-facesA library to generate random ASCII cat faces + binary to print them out7,957MITCommand line utilities cat-boxWork in progress game engine, inspired by arcade15,644MIT cat-cliConcatenate and send files to standard output788Unlicense OR CC0-1.0Command line utilitiesFilesystem cat-cloneA tool to display contents of files1,548MIT OR Apache-2.0Command line utilities cat-devA library for interacting with the CAT-DEV hardware units distributed by Nintendo (i.e. a type of Wii-U DevKits).14,225MIT cat-dev-serialA library for interacting with the serial port of a CAT-DEV hardware unit distributed by Nintendo (i.e. a type of Wii-U DevKits).345MIT cat-dev-telnetA library for interacting with the telnet service on a CAT-DEV (wii-u devkit) host bridge, like a MION.339MIT cat-dirBundle directory tree into one plain-text file. (like tar, but you can `cat` it)19MITCommand line utilitiesFilesystem cat-envelopeA library for wrapping and unwrapping taproot scripts into an envelope for working with the OP_CAT signer1,272MIT cat-faxLike Cowsay, but with (mostly) factually accurate cat facts!11,582MIT cat-fetchMusKitty multi-repo source management CLI — one command to clone, build, test, push, and publish 8 independent crate repositories29Apache-2.0Command line utilitiesDevelopment tools cat-in-boxUse Cat instead of Box34MIT OR Apache-2.0 cat-loggrA simple, lightweight utility for making beautiful logs4,220MITCommand-line interfaceDevelopment tools::Debugging cat-onceTool used to cat files in tight disc conditions saving disk space5,479GPL-3.0 cat-qcat-q library for testing and scoring3,266MIT cat-rscat client with rust21,655MIT cat-signer-apiAn api client for working with the OP_CAT signer1,038MIT cat-tokenImplementation of CTA-5007-B Common Access Token specification96BSD-2-ClauseAuthenticationCryptography cat-wgpuCategorical host layer for wgpu compute: adapter, device, buffers, shaders, and dispatches expressed as comp-cat-rs Io/Resource…40MIT OR Apache-2.0Hardware supportMathematics cat24c32-rsPlatform-agnostic Rust driver for CAT24C32 EEPROM Serial 32Kb I2C devices399MIT OR Apache-2.0Embedded developmentHardware support cat25040A `no_std`, async Rust driver for the **ON Semiconductor CAT25040** (4-Kbit SPI EEPROM), built on…401Apache-2.0Embedded developmentHardware support cat2textA port of Cat2Text to Rust, with extra functionality, better documentation, and support for using it as a library as well.2,353GPL-3.0-or-laterEncoding cat_and_truncateTool used to cat files in tight disc conditions saving disk space1,261GPL-3.0 cat_audioA multichannel audio engine for CatEngine7,634MIT cat_engineA 2D graphics engine with audio output support67,921MIT cat_engine_basementThe CatEnigne's basement11,200MIT cat_minigrepA simple demo about learning how to use rust.1,420MIT OR Apache-2.0 cat_sayA catsay cli tool2,126MIT OR Apache-2.0 cat_solverRust bindings for the Kissat SAT solver4,511MITMathematicsScience cat_translatorencodes text into cat noises code and vice-versa38non-standardCommand line utilities catatoolkit for building large CLIs1,787non-standardCommand-line interface cata-bmTUI browser for 'Cataclysm: Bright Nights' JSON data.26MIT cata-coisaA tool to search files1,589MIT OR Apache-2.0Command line utilities cata-deriveprocedural macros to derive traits for CLI construction2,032non-standardCommand-line interface cataclysmA simple http framework68,504MIT cataclysm-jwtSimple session creator for JWT handling in cataclysm1,315MIT cataclysm-wsAuxiliary websockets crate for cataclysm19,052MIT catalanbinary tree of n variables where the parent node represents a function and the child node represents a value.9,349MPL-2.0 catalinaEmbedded Rust ecosystem for audio processing and music28MITCommand line utilitiesEmbedded development catalina-bspBoard support packages for Catalina native hardware components124MIT catalina-engineAudio and synth DSP framework for creating audio processing and music platforms on embedded platforms231MIT catalina-instrumentsBasic instruments to quickly get started with on Catalina hardware, also serves as references and samples for the instrument…127MIT catalistCat, but for lists6,133MIT catalogA file-based map to store key/value pairs in a file and get them using binary search5,304MIT catalog-of-markdownGenerate the catalog of markdown file.8,159MIT catalog-rsplace holder for possible netidx rename1,597MITNetwork programming catalyserA comprehensive collection of extensions to simplify and enhane rust development.1,134non-standardRust patterns catalyshA command line utility for interaction with Ciscos Catalyst Center, utilizing it's API5,740non-standardCommand line utilities catalysisCatalysis is a full-stack and runtime-agnostic Javascript framework powered by Rust3,352MIT catalystA lightweight API testing tool5,566MPL-2.0Development tools catalyst-protocol-sdk-rustProtocol Specification for Catalyst Network18,989MIT catalyst_entitiesLow level data-structures for multithreaded and incremental compilation.4,030MIT catalyst_rsxCatalyst RSX is a comprehensive full-stack framework for building server-side rendered components like a React App in Rust.746MIT catalystwatchCatalystWatch - by ChartClass22MIT catalyticORM for Scylla, fully compatible with Apache Cassandra™56,149MIT catalytic_macroMacros for the ORM for Scylla, fully compatible with Apache Cassandra™38,760MIT catalytic_query_parserQuery parser for the ORM for Scylla, fully compatible with Apache Cassandra™39,565MIT catalytic_table_to_structTable mapper for the ORM for Scylla, fully compatible with Apache Cassandra™54,983MIT catalyxA reactive streaming runtime inspired by join calculus and chemical reaction models26MITAsynchronousConcurrency catalyzewip1,471MIT OR Apache-2.0 catalyzerHTTP server framework5,155non-standardAsynchronousNetwork programming catalyzer-coreCore of Catalyzer4,369non-standardAsynchronousNetwork programming catalyzer-macrosMacros to make life easier4,338non-standardAsynchronousNetwork programming catalyzer-utilsUtilities to make development easier4,590non-standardAsynchronousNetwork programming catapultCatapult sends you logs elsewhere4,729MIT catapultaDeclarative deployment DSL for Rust - provision, configure, and launch containers to any VPS160MITCommand line utilitiesConfiguration catapulteCatapulte is an open source mailer you can host yourself. You can use it to quickly catapult your transactionnal emails to…4,303non-standard catapulte-adapter-httpHTTP adapter for catapulte - Axum-based web server24AGPL-3.0 catapulte-adapter-smtpSMTP adapter for catapulte - implements EmailSender using Lettre23AGPL-3.0 catapulte-adapter-templateTemplate adapter for catapulte - implements TemplateLoader and TemplateRenderer23AGPL-3.0 catapulte-domainCore domain layer for catapulte - business logic and port traits279AGPL-3.0 catapulte-engineThe core engine of catapulte with template loading, interpolation and rendering.1,658AGPL-3.0 catapulte-preludeThe package containing the file formats for exchanging templates and metadata files.527AGPL-3.0 catatauA TUI EPUB reader with fuzzy search and navigation666MIT OR Apache-2.0Command line utilitiesText processing catbatcats the bat5,539MITCommand line utilities catbeards_my_crateA test library from learning the rust book1,220MIT catboostCatboost inference library for Rust3,673MIT OR Apache-2.0 catboost-portableUnofficial bindings for the catboost library.2,798Apache-2.0 catboost-portable-sysLow-Level Rust bindings to the catboost library.3,995Apache-2.0 catboost-rsUnofficial Rust bindings for Catboost (Machine Learning Gradient Boosting Library from Yandex)20,277MIT/Apache-2.0 catboost-rustRust bindings for CatBoost, a gradient boosting library for machine learning. Downloads CatBoost binaries at runtime for…12,331Apache-2.0Science catboost-sysInternal unsafe Rust bindings for catboostlib C apis using bindgen17,558MIT/Apache-2.0 catboost2Unofficial bindings for the catboost library.2,646Apache-2.0 catboost2-sysLow-Level Rust bindings to the catboost library.3,479Apache-2.0 catboxImplementation of Catbox.moe's API15,217MITAPI bindingsCommand line utilities catbox-cliA simple catbox cli that has progress when uploading!2,308MITCommand line utilities catbox-ngImplementation of Catbox.moe's API521MIT-0API bindingsCommand line utilities catboxrsSimple wrapper for catbox api1,713MIT/Apache-2.0 catbuffer-rustSerialize and deserialize NEM's Catapult entities in Rust applications.1,652MIT catbusA Wayland IME for multilingual text input31GPL-3.0 catcatA version of the GNU/Linux cat command which also depicts a cat5,530MITCommand line utilities catchA downloader + pinger with secure DLB/DQB storage1,602MIT catch-inputLibrary implementing a macro for retrieving user input from the console.7,173MITCommand-line interfaceCommand line utilities catch-unwindWrappers for catch_unwind that handle the edge case of the caught panic payload panicing5,010Zlib OR MIT OR Apache-2.0Development toolsRust patterns catch_panicA helper macro for safe Java-Rust interop that "catches" Rust panics and rethrows them as Java exceptions.48,070MIT OR Apache-2.0API bindings catch_panic_macrosThe proc macro impl for catch_panic48,725MIT OR Apache-2.0API bindings catcher-coreShared core types and errors for catcher — zero I/O dependencies733MIT catcher-dnsShared DNS resolver and system proxy detection for catcher344MIT catcher-ffiUnified C ABI library for catcher — links HTTP + WS + codec into a single .so/.dylib314MIT catcher-httpHTTP client for catcher — resilient transport with retry, circuit breaker, priority scheduling514MIT catcher-uniffiUniFFI bindings for catcher — auto-generates Swift + Kotlin from Rust API305MIT catcher-wsWebSocket client for catcher — resilient reconnect, heartbeat, multi-endpoint racing506MIT catchrA testing framework inspired by Catch for C++8,883MIT catchr-coreCore library of catchr the testing framework8,562MIT catclusteringAgglomerative Clustering For Categorical Data3,860MIT catconfAllows for reading from the executing binary in order to pull configuration4,156AGPL-3.0-only catcsvConcatenate directories of (possibly-compressed CSV) files into one CSV file5,127MIT/Apache-2.0 catdogA tool to read files and outputs the contents to the console. This is a re implementation of the popular cat cli tool using rust.1,594MIT OR Apache-2.0Command line utilities catdreamSleeping cat dreams your text1,578MIT categoricalcombining categorical random distributions and computing exact probabilities4,294MIT OR Apache-2.0MathematicsSimulation categorical-agentsCategorical formalization of agent capabilities as symmetric monoidal category objects with protocol morphisms13MITMathematicsScience categoriesCategory theory in Rust611AGPL-3.0 categorycategory1,593MIT OR Apache-2.0 catena-clicommand line interface for catena-lang19MIT OR Apache-2.0 catena-corecatena: the deterministic array language28MIT OR Apache-2.0 catena-langcatena: the deterministic array language20MIT OR Apache-2.0 catenaryA library for catenary curves6,360MIT OR Apache-2.0 catenary-backendimport and backend for gtfs data3,123non-standard catenary-cliName reservation for Catenary's CLI/daemon binary package — the catenary-mcp crate split (ws41) lands the real package here. See…15AGPL-3.0-or-later catenary-frontendfrontend for dev backend2,145MIT OR Apache-2.0GUIWebAssembly catenary-mcpA high-performance multiplexing bridge between MCP (Model Context Protocol) and LSP (Language Server Protocol). Enables LLMs to…746AGPL-3.0-or-laterDevelopment tools catenary-procSingle-process CPU sampling for tick-budget diagnostics waits175AGPL-3.0-or-laterOperating systems catenary-tsSafe FFI wrapper for loading tree-sitter grammars from shared libraries138AGPL-3.0-or-laterDevelopment tools catengineA simple 2D and 3D engine for rendering ghraphics.101MIT catenis_api_clientCatenis API client library for the Rust programming language7,826MIT OR Apache-2.0API bindings caternaryCaternary is a stack-based language and runtime.71Apache-2.0 caterpillarDetect and apply RAUC update bundles during boot2,789MIT OR Apache-2.0AsynchronousCommand line utilities catfactFetches cat facts.1,747non-standardAPI bindings catfactsGenerates cat facts2,741MIT OR Apache-2.0Command line utilities catfishcatfish is a CLI tool that compares two directories by hashing all files. It reports which files are in the 'right' folder but…1,689MITCommand line utilitiesFilesystem catfishingSteal fields of another struct638LGPL-3.0-or-later catflapCreates a TCP socket and passes its descriptor as an env variable6,878MITCommand line utilitiesDevelopment tools catfoodA modular utility suite for system management, built with Rust and Ratatui70MIT catfood-barA system bar component of the catfood utility suite181MIT catfsCache AnyThing filesystem12,450Apache-2.0CachingFilesystem catfxApply effects to a text stream51MIT OR Apache-2.0 catgirl-engineA game engine for cool moddability and procedurally generated data122,905ZlibGame engines catgirl-engine-clientClient side part of the catgirl-engine crate115,236ZlibGame engines catgirl-engine-commonCommon crate for the catgirl-engine crate6,059ZlibGame engines catgirl-engine-macrosProcedural macro crate for the catgirl-engine crate9,751ZlibGame engines catgirl-engine-serverServer side part of the catgirl-engine crate109,522ZlibGame engines catgirl-engine-utilsUtility crate for the catgirl-engine crate100,052ZlibGame engines catgrada categorical deep learning compiler1,738MIT catgrad-llmTools for LLMs built with catgrad482MIT catharAudio toolkit in pure Rust — denoise, de-hum, de-click, de-clip, de-reverb, normalise, and more.400MIT OR Apache-2.0MultimediaMultimedia::Audio cathar-cliAudio restoration CLI in pure Rust — denoise, de-hum, de-click, de-clip, de-reverb, normalise, and more.299MIT OR Apache-2.0Command line utilitiesMultimedia::Audio cathedral-probeSpectral topology analysis for microservice and component graphs — measure the health of the space between components54MITAlgorithmsScience cathlametDistributed systems substrate1,969MIT cathodeReserved for future development.19MIT OR Apache-2.0 cathubMulti-client CAT and WinKeyer hub daemon32MIT cathub-protocolVersioned gRPC contracts for CatHub clients47MIT cathulhuAn GitHub cli written in Rust2,528Apache-2.0 catiaRust COM bindings and helpers for CATIA V5546MITAPI bindingsOperating systems::Windows APIs catimgCat and Preview your images directly in terminal using sixel680MIT catinatorHigh Level IRC Bot library and instance4,300ISC catinator_macrosproc macros for catinator5,112ISC catjA light process isolation sandbox used for competitive programming contest13,542MITCommand line utilities catkin-bloombuild entire catkin workspace using bloom2,902MITCommand line utilitiesDevelopment tools catlinesControls file output with line ranges!3,687GPL-3.0 catloafcore-affine, thread-local, opinionated actor framework.49BSD-3-ClauseAsynchronous catlockDefend keyboard against your cat5,249CC0-1.0 OR UnlicenseAuthenticationCommand line utilities catlogTBA1,314MIT OR Apache-2.0 catmarkConsole printer for CommonMark8,681GPL-3.0 catnapVisual CLI sleep16ISCCommand line utilities catnipNo-std, panic-never, heapless UDP/IP ethernet stack for data acquisition and real-time controls9,279MIT OR Apache-2.0 catnukh_matrix_parserMatrix operations parser for eeducational purpose38MITCommand line utilitiesParsing tools catnukh_parserA brief description199MIT catoA file catenation tool written in Rust.42GPL-3.0-onlyCommand line utilities cato-cliPortable sandbox for secure command execution302MIT catool-sqlSQL query builder1,980MITDatabase interfaces catopyCopy file content to clipboard safely with size guards17GPL-3.0Command line utilities catpPrint the output of a running process6,674GPL-3.0 catppuccin🦀 Soothing pastel theme for Rust.91,212MIT catppuccin-catwalk🚶 Soothing pastel previews for the high-spirited!16,020MIT