All 305,250 crates, alphabetically

catppuccin-eguiSoothing pastel theme for egui.88,769MITGUI catppuccin-purrUnoffical CLI for developing Catppuccin ports14,595MITCommand line utilities catppuccin-whiskers😾 Soothing port creation tool for the high-spirited!24,004MIT catprintercontrol ur cat printer using this module (MXW01 only :3)46MIT catptcha_oxide_deriveUseful proc macros for captcha_oxide8,115MIT OR Apache-2.0 catrA fully functional clone of the GNU concat tool built completely in Rust.3,876GPL-3.0-only catreadA reader that allows for concatenation of multiple readers.3,803MIT OR Apache-2.0 catsCoding Agent ToolS - A comprehensive toolkit for building AI-powered coding agents1,806MIT OR Apache-2.0Command line utilitiesDevelopment tools cats-utilsutilities for CATS' crates2,734MIT catsayA catsay cli program1,781Unlicense catsay-1020Catsay is a simple, fast, and free cat-based ASCII art generator.1,618MIT catsay-agA CLI exercise1,732MIT catsay-AKA catsay cli1,090MIT catsay-bpvcatsay - tool that makes a cat speak your message3,016MIT OR Apache-2.0 catsay-exampleA fan catsay example program from a book31MIT catsay-jasperInitial CLI project making a cat say something1,663MIT catsay-maicmiA Rust typical command-line program takes arguments, flags, and sometimes standard input and then executes its main algorithm and…1,473MIT catsay-rsA simple cowsay, but with a cat!5,335MIT OR Apache-2.0Command line utilities catsay_1estartclone unix cowsay, program which output text as cat say it1,671MIT catsay_ebenezercatsy command line bin1,840MIT catscope-edge-generatorA edge generator for System, Token, Safejar, and Solpipe accounts560MIT catshA multiplatform, fast, and powerful cat shell2,854GPL-3.0 catsh-cliA cross-platform shell.9,942MITCommand-line interfaceCommand line utilities catsh-coreA cross-platform shell.11,935MITCommand line utilities catsploitAn open-source modern exploitation framework inspired by Metasploit2,872non-standard catsploit_libCatsploit library2,224non-standard catsuHigh-performance embeddings client for multiple providers292Apache-2.0AsynchronousWeb programming::HTTP client catswords-jsrtSafe-ish ergonomic Rust wrapper for ChakraCore JsRT67MITAPI bindings catswords-jsrt-sysRaw FFI bindings for ChakraCore (JsRT). Unsafe layer only.130MITExternal FFI bindings catt-coreCATT core traits and types2,544MIT/Apache-2.0 cattailTail multiple files and glob patterns with live discovery and labeled output37MITCommand line utilitiesFilesystem cattlerustlerA library for localized calendar management.9,177BSD-3-Clause cattocolCombine two text into one text as columns.5,744GPL-3.0-or-laterText processing cattySend and await a value asynchronously99,355Apache-2.0AsynchronousConcurrency catty-playeraudio player in your terminal228Apache-2.0 catvecPersistent, catenable vectors27,428ISC catwalkAn API for structured data in kv databases.3,211MITDatabase interfaces catwalk-p-sledSled backend for the catwalk crate.1,764MITDatabase interfacesDatabase implementations catwalk-s-protobufProtocol Buffer (protobuf) serialization for the catwalk crate.1,754MITDatabase interfacesDatabase implementations catzconnectSecure, minimal SDK for sending encrypted communication requests to the CatzConnect API77ISC cauchyTrait for real and complex numbers2,116,528MITAlgorithms caucusA terminal multiplexer for teams of AI coding agents220MITCommand line utilitiesDevelopment tools caudal-sdkCaudal SDK - Event observability for distributed systems164MIT OR Apache-2.0AsynchronousDevelopment tools cauld-ronWASM-driven RON build infrastructure for Bevy projects66MIT OR Apache-2.0 cauldronPure rust audio decoder for wav, flac, mp3 and aac4,189Apache-2.0EncodingMultimedia::Audio cauly-rust-leetcode-utilsSome reusable code for leetcode2,998MIT causalA deterministic, event-driven coordination layer where machines decide, effects execute, and transactions define authority1,397MIT causal-dagLock-free append-only causal DAG (G-Set CRDT) for AI agent memory.18Apache-2.0ConcurrencyData structures causal-graphDAG-based causal graph — topological sort, reachability, ancestor/descendant queries18MIT causal-hubA library for causal models, inference and discovery.458AGPL-3.0-onlyAlgorithmsData structures causal-lengthCRDT's based on causal length sets1,763MIT OR Apache-2.0Data structures causal-triangulationsCausal Dynamical Triangulations in d-dimensions33BSD-3-ClauseAlgorithmsMathematics causal_adminAdmin UI backend for causal event-driven applications37MIT causal_core_macrosProcedural macros for causal1,470MIT causal_inspectorInspector backend for causal event-driven applications1,040MIT causal_inspector_utilsDescribe DSL and shared utilities for the causal inspector UI665MIT causal_replayReplay and projection library for causal event processing1,044MIT causal_utilsUtility patterns for causal-based applications — batching, dataloader, and more1,018MIT causalityEvent Driven Architecture Traits3,031MIT causality-mcp-causal-engineCausal analysis engine for causality-mcp (DAG, Lamport clocks, exports).69MIT causality-mcp-ingestLog ingestion for causality-mcp (format detection, parsing, Docker and local sources).70MIT causality-mcp-serverMCP server binary for causality-mcp (Claude Desktop stdio JSON-RPC).19MIT causality-mcp-storageEmbedded storage for causality-mcp (sled-backed event and index persistence).162MIT causality-mcp-typesShared core types for the causality-mcp workspace.206MIT causalontologyThe Rust binding of the Causalontology standard - a verb-first noun-hosting ontology; reified causation as a…30non-standard causasvCausal feature attribution via Asymmetric Shapley Values (ASV) over DAGs — Rust + Python228MIT OR Apache-2.0AlgorithmsScience causeA generic [std::error::Error] implementation.15,703MIT causewayReserved name for Causeway Mesh — a serverless, partition-tolerant, post-quantum group-encryption protocol built on the Causal…19MIT OR Apache-2.0Cryptography causeway-btcCauseway off-chain helpers for Bitcoin — P2TR address derivation, BIP-341 sighash, witness assembly39Apache-2.0Cryptography::Cryptocurrencies causeway-cpiAnchor CPI wrappers — tenant programs call into Causeway via this crate34Apache-2.0Cryptography::Cryptocurrencies causeway-deriveOff-chain Causeway address derivation — pure Rust, no Solana dependencies134Apache-2.0Cryptography::Cryptocurrencies causeway-evmCauseway off-chain helpers for EVM assets — address derivation, EIP-1559 sighash, signed-tx assembly36Apache-2.0Cryptography::Cryptocurrencies causeway-orchardCauseway off-chain helpers for Zcash Orchard shielded — bech32m payment-address parse/encode + raw 43-byte payload helpers22Apache-2.0Cryptography::Cryptocurrencies causeway-reddsaCauseway fork of reddsa with frost-rerandomized 3.0 support for threshold Sapling and Orchard custody.17MIT OR Apache-2.0CryptographyNo standard library causeway-saplingCauseway off-chain helpers for Zcash Sapling shielded — bech32 payment-address parse/encode + raw 43-byte payload helpers42Apache-2.0Cryptography::Cryptocurrencies causeway-typesOn-chain Causeway program types — Borsh-only, no Solana deps128Apache-2.0Cryptography::Cryptocurrencies causeway-zecCauseway off-chain helpers for Zcash transparent — address derivation, ZIP-244 v5 sighash, signed-tx assembly38Apache-2.0Cryptography::Cryptocurrencies causlaneTyped, auditable, replayable, consequence-aware action dispatch.17MIT OR Apache-2.0Development toolsRust patterns causlane-cliDeveloper/operator CLI for causlane.20MIT OR Apache-2.0Development toolsRust patterns causlane-codegenGenerated formal artifacts for causlane compiled bundles.26MIT OR Apache-2.0Development toolsRust patterns causlane-contractsRegistry and compiled bundle contracts for causlane.51MIT OR Apache-2.0Development toolsRust patterns causlane-corePure semantic dispatch kernel for causlane.69MIT OR Apache-2.0Development toolsRust patterns causlane-formalFormal-toolchain readiness checks (formal doctor) for causlane.26MIT OR Apache-2.0Development toolsRust patterns causlane-replayReplay verifier for causlane protocol traces.35MIT OR Apache-2.0Development toolsRust patterns causlane-runtimeRuntime composition shell and adapters for causlane.25MIT OR Apache-2.0Development toolsRust patterns causticA General-Purpose 6D Collisionless Gravitational Dynamics Solver327GPL-3.0ScienceSimulation cautious-carnivalA programmable mathematical animation engine — a Rust replacement for Manim.54GPL-3.0GraphicsMultimedia::Video cautious-octo-funicularTest: shipping an mdbook with API docs8,947MIT OR Apache-2.0 cautomatacautomata466MIT cauuuA SDK for the cauuu staking contracts2,748GPL-3.0 cauzSuccinct error handling1,755GPL-2.0 cavacoreA rust wrapper of cavacore from the cava music visualizer.3,126MIT cavalier_contours2D polyline/shape library for offsetting, combining, etc.32,852MIT OR Apache-2.0AlgorithmsData structures cavalier_contours_ffiC foreign function interface for the cavalier_contours crate4,855MIT OR Apache-2.0AlgorithmsData structures cave-fmtParse various cave /speleo related data formats5,362MIT OR Apache-2.0 cavedCodecs for Audio and Video Encoding and Decoding, static bindings to libav (ffmpeg). Some re-implemented in Rust. Goal is for all…2,357MIT / BSL-1.0API bindingsCompression cavegenLibrary for 2 dimensional cave generation1,591MIT cavemanLibrary for OogaBoogaGames Caveman game and asset format.2,449GPL-3.0-or-later cavesA collection of embedded, thread-safe key-value stores in Rust.17,332MPL-2.0Database implementations cavestory-save-libeditor for profile.dat of cavestory32,824non-standardParser implementations cavestory_save_editorprofile.dat editor compatible with cavestory(+)9,069non-standard caviarderRedact secrets and PII from text using gitleaks detection rules.81MIT cavifEncodes images in AVIF format (image2avif converter) using a pure-Rust encoder.42,276BSD-3-ClauseCommand line utilitiesMultimedia::Encoding cavintA Rust native library for Cavalieri integration.1,617non-standard cavityCreate files padded with zeros. Alternatinve to macOS's mkfile.7,736BSD-2-ClauseFilesystem cavity-cliCreate files padded with zeros. Alternatinve to macOS's mkfile.2,025BSD-2-ClauseCommand line utilities cavpLibcrux helper to read NIST CAVP test vectors.7,674Apache-2.0 cavs-analyzerSteamPipe-style update models, pack-file diagnostics and layout recommendations for CAVS builds.271Apache-2.0 cavs-chunkerFixed-size and FastCDC content-defined chunking used by CAVS.612Apache-2.0AlgorithmsCompression cavs-cliPackage, verify and deliver deduplicated game content as .cavs files.367Apache-2.0Command line utilitiesCompression cavs-clientNative streaming client with a persistent cache for CAVS content delivery.334Apache-2.0Command line utilities cavs-fetchEmbeddable serverless/CDN fetch engine for CAVS: plan, download by hash and reconstruct game builds from a static export, with…116Apache-2.0Game development cavs-ffiStable C ABI over cavs-sdk-core for the CAVS language SDKs (Go/Java/Node)116Apache-2.0 cavs-formatThe .cavs binary container format: streaming writer, hardened reader, Ed25519 signing.613Apache-2.0CompressionEncoding cavs-hashBLAKE3-256 chunk hashing and Merkle roots for the CAVS content-addressable format.913Apache-2.0Cryptography cavs-lfs-agentGit LFS standalone custom transfer agent backed by CAVS: content-defined chunking, zstd, and chunk-level dedup so only changed…60Apache-2.0Command line utilitiesDevelopment tools cavs-manifestCAVS manifest formats: compact binary v2 codec and JSON v1 compatibility reader481Apache-2.0EncodingGame development cavs-planOffline reconstruction plans (.cavsplan): deterministic diff, portable patches and journaled applies for CAVS.312Apache-2.0CompressionGame development cavs-protoCVSP wire protocol types for CAVS content delivery (manifests, sessions, binary batches).660Apache-2.0EncodingNetwork programming cavs-rebuild-planHybrid reconstruction planning for CAVS: unify cache, network and previous-artifact sources into one verified plan289Apache-2.0 cavs-sdk-coreHigh-level JSON operation engine shared by the CAVS FFI layer and the language SDKs152Apache-2.0 cavs-serverHTTP/HTTPS origin server for CAVS content delivery.335Apache-2.0Command line utilitiesWeb programming cavs-signatureCAVS signature format (.cavssig): compact old-version block hashes for hybrid reconstruction371Apache-2.0 cavs-steamEstimate a game build's SteamPipe update size and detect pack files causing update bloat.163Apache-2.0Command line utilitiesGame development cavs-storeContent-addressable store with reference counting and garbage collection for CAVS.659Apache-2.0CachingFilesystem cavs-workspaceLocal app/depot/branch/build workspace model for CAVS: SteamPipe-like distribution concepts without a platform.228Apache-2.0 cawA framework for building software-defined modular synthesizers10,972MIT caw_audio_fileLoad audio files for sampling in the caw synthesizer framework4,349MIT caw_bevyHelpers for controlling a caw syntesizer from bevy2,951MIT caw_builder_proc_macrosA macro for generating builders4,771MIT caw_computer_keyboardUse a computer keyboard to control caw synthesizer modules7,266MIT caw_coreCore types for caw software-defined modular synthesizer14,561MIT caw_interactiveInteractive keyboard and mouse control, and visualization for the caw synthesizer framework10,235MIT caw_keyboardAbstract representation of a (musical) keyboard for the caw synthesizer framework10,479MIT caw_liveHelpers for live-coding performances with CAW1,066MIT caw_midiCommon midi logic for the caw synthesizer framework6,876MIT caw_midi_filePlay midi files with the caw synthesizer framework4,387MIT caw_midi_liveUse a midi device to control caw synthesizers4,330MIT caw_midi_serialControl caw synthesizers with a serial device that transmits midi data over a serial port4,854MIT caw_midi_udpA caw signal of MIDI events backed by a UDP/IP server which can receive serialized MIDI events1,269MIT caw_midi_udp_clientA UDP client for sending midi commands to caw synthesizers1,684MIT caw_midi_udp_widgets_appApp for launching widgets that communicate with a caw synthesizer by sending midi commands over UDP3,019MIT caw_midi_udp_widgets_app_libLibrary for launching instances of caw_midi_udp_widgets_app as signals of MIDI commands1,091MIT caw_modulesCollection of synthesizer modules for the caw synthesizer framework9,820MIT caw_patchesCollection of common patches for the caw synthesizer framework5,681MIT caw_persistHelpers for persisting data within the CAW synthesizer framework1,334MIT caw_playerPlay audio from the caw synthesizer framework10,689MIT caw_sdl2Helpers for interfacing with sdl2 in the CAW synthesizer framework913MIT caw_utilsUtilities for building synthesizers with caw7,435MIT caw_viz_udp_appApp for visualizing audio data from the caw synthesizer framework1,499MIT caw_viz_udp_app_libLibrary for launching and interacting with instances of caw_viz_udp_app1,305MIT caw_widgetsGraphical widgets for the caw synthesizer framework3,505MIT caw_window_utilsHelpers for working with windows within the CAW synthesizer framework749MIT cawg-identityRust SDK for CAWG (Creator Assertions Working Group) identity assertion19,293MIT OR Apache-2.0API bindings cawsChaos on AWS Library8,882MIT caxmini-parser for converting custom codes into ansi escape sequences (terminal colors & styles)1,747MIT OR Apache-2.0Command line utilitiesEncoding caxeA modern C/C++ project manager that cuts through build system complexity. Zero config, smart dependencies, and parallel builds.916MIT OR Apache-2.0Command line utilitiesDevelopment tools::Build Utils caxtonA secure WebAssembly runtime for multi-agent systems2,272MIT OR Apache-2.0ConcurrencyNetwork programming caydencea wallpaper switching utility with pomodoro capabilities5,430MIT cayennean implementation of the SPICE circuit simulation program in Rust1,684BSD-3-Clause cayenne_lppRust crate that implements the Cayenne Low Power Payload (LPP) format3,655MIT cayleyA crate for generic, stack-allocated linear algebra stuff, such as matrices2,822GPL-3.0-or-laterAlgorithmsMathematics cazan-commonThe common library to `cazan-cli` and `cazanw`2,938MIT cazan-utilsA cargo crate containing all the tools common to CLI and WASM3,567non-standard cazzoplaceholder2,928MIT cbclipboard manager5,096non-standard cb-digestA direct port of the Golang DDSketch implementation.1,225MIT cb-project-metadata-updaterTracks relationships between source code and their AWS Code Build projects to coordinate rebuilds of consumers when changes are…4,160MIT cb-stm-tempSoftware Transactional Memory system built on top of crossbeam-epoch5,884MIT/Apache-2.0 cb2A task runner supporting nested sequences5,399MIT cb2_coreThe core for the cb2 command runner5,902MIT cb2utilCodeBreaker PS2 File Utility1,730MIT cb58Implementation of CB58 standard used by Avalanche.5,751Apache-2.0 cb_futCall function that return value via callback without a callback4,422BSD-3-ClauseAsynchronousRust patterns cbadvAsynchronous Coinbase Advanced REST and WebSocket API25,114MITAPI bindingsCryptography::Cryptocurrencies cbasmAsm assembler & dissasembler for cbvm bytecode20,297GPL-3.0 cbatThe unofficial Rust crate for the Coinbase Advanced Trade API12,714MIT cbbA base converter22,431MITCommand line utilities cbcCipher Block Chaining (CBC) block cipher mode of operation77,085,331MIT OR Apache-2.0CryptographyNo standard library cbc-macImplementation of Cipher Block Chaining Message Authentication Code (CBC-MAC)19,069MIT OR Apache-2.0 cbc-srcRedistribution of Coin-OR Cbc as a crate14,438Apache-2.0 cbdCommand-line CBOR decoder and encoder1,751Apache-2.0Command line utilitiesEncoding cbdrTools for comparitive benchmarking9,089Unlicense cbe-config-programCartallum CBE Config program1,653Apache-2.0 cbe-frozen-abiCartallum CBE Frozen ABI4,811Apache-2.0 cbe-frozen-abi-macroCartallum CBE Frozen ABI Macro5,252Apache-2.0 cbe-loggerCartallum CBE Logger5,219Apache-2.0 cbe-measureBlockchain, Rebuilt for Scale2,749Apache-2.0 cbe-metricsCartallum CBE Metrics2,762Apache-2.0 cbe-programCartallum CBE Program4,297Apache-2.0 cbe-program-runtimeCartallum CBE program runtime2,231Apache-2.0 cbe-sdkCartallum CBE SDK3,750Apache-2.0 cbe-sdk-macroCartallum CBE SDK Macro4,798Apache-2.0 cbe_rbpfVirtual machine and JIT compiler for eBPF programs2,781Apache-2.0 cbenchEnvironment control for benchmarks2,176GPL-3.0-or-laterDevelopment tools::Cargo pluginsDevelopment tools::Profiling cbfA framework for developing Chromium-based browsers.246BSD-3-ClauseWeb programming cbf-chromeChromium-specific safe API layer for CBF.204BSD-3-ClauseAPI bindingsWeb programming cbf-chrome-sysLow-level Chromium bridge bindings for CBF.260BSD-3-ClauseAPI bindingsExternal FFI bindings cbf-cliCBF developer workflow CLI38BSD-3-Clause cbf-compositorScene-based browser surface compositor for CBF applications.155BSD-3-ClauseGUIRendering