All 305,250 crates, alphabetically

cipron-fingerprintHigh-accuracy request fingerprinting with encrypted opaque storage — 99.5% identification rate21MIT ciqadamqClustered MQTT broker built on RMQTT with a REST API for user management, per-user topic ACLs, and message expiry258AGPL-3.0-onlyAsynchronousNetwork programming cirLinux Infrared Tooling8,205MIT cirandaA deterministic password generator52Apache-2.0 OR MITCommand line utilitiesSecurity circEfficient referenced counted pointers for non-blocking concurrency2,526MIT OR Apache-2.0ConcurrencyMemory management circ_bufferA bare-metal fixed-size statically allocated ring-buffer with optional serde (De)-Serialization.35,395MIT OR Apache-2.0 circadiaCompute sunrise/sunset times6,822MIT circadianLinux auto-suspend/wake power management daemon14,830GPL-3.0 circadian_timeCircadian timezone support for chrono4,340MIT circadian_toolsTools for working with circadian data, or data that is cyclical like time of day.7,765MITDate and timeMathematics circbufA growable circular buffer for working with bytes37,136MIT circeIRC crate in Rust8,270Unlicense circfpCompute elliptical footprints resulting from circular iFOVs309Apache-2.0 OR MIT circleDefinition of circle and ellipse15,909MPL-2.0 circle-buidl-walletsRust client for the Circle Web3 Services Modular Wallets (Buidl) API93Apache-2.0API bindingsWeb programming::HTTP client circle-cliCommand-line interface for the Circle Web3 Services SDK22Apache-2.0Command line utilities circle-complianceRust client for the Circle Web3 Services Compliance Engine API93Apache-2.0API bindingsWeb programming::HTTP client circle-developer-controlled-walletsRust client for the Circle Web3 Services Developer-Controlled Wallets API92Apache-2.0API bindingsWeb programming::HTTP client circle-of-confusionCalculator for Circle of Confusion (CoC) to calculate the size in pixels of an area, used for depth of field processing2,722EUPL-1.2AlgorithmsMathematics circle-packerImplements a circle packing algorithm: https://en.wikipedia.org/wiki/Circle_packing_theorem3,265MIT circle-rsMinimalistic modern infinite progress indicator.10,931MIT OR Apache-2.0 circle-user-controlled-walletsRust client for the Circle Web3 Services User-Controlled Wallets API92Apache-2.0API bindingsWeb programming::HTTP client circle_apiA library for interacting with the CircleCI API2,923MIT Circle_Areacircle of area function7,004MIT circle_boundaryA Rust library to calculate the boundary of a circle, coordinates given in bitmap style discrete integers.14,005ISC circle_bufferA simple circular buffer.7,285non-standard circleci-junit-fixFixes junit reports to have proper integration with CircleCI12,105MIT circleci-logsCLI tool for fetching CircleCI job logs, test results, and workflow info63MITCommand line utilitiesDevelopment tools circlesA common utils lib.67MIT OR Apache-2.0 circles-abisCircles contract ABIs and bindings294MIT OR Apache-2.0 circles-pathfinderPathfinding and flow matrix calculation for the Circles protocol2,714MIT OR Apache-2.0Cryptography circles-profilesCircles profile service client182MIT OR Apache-2.0 circles-rpcCircles JSON-RPC client (HTTP + WS)498MIT OR Apache-2.0 circles-sdkCircles SDK orchestrating RPC, profiles, pathfinding, transfers, and contract runners.63MIT OR Apache-2.0 circles-sketchGenerate interactive Fourier epicycle animations from contours, text, or SVG files227MITCommand line utilitiesVisualization circles-transfersTransfer transaction builder for Circles protocol195MIT OR Apache-2.0 circles-typesCore type definitions for the Circles protocol2,640MIT circles-utilsShared Circles utilities (demurrage/inflation conversions, helpers)551MIT OR Apache-2.0 circom-lspLSP server for Circom6,746GPL-3.0 circom-lsp-parserSupport crate for circom-lsp3,398GPL-3.0 circom-lsp-program-structureSupport crate for circom-lsp4,374GPL-3.0 circom-lsp-type-analysisSupport crate for circom-lsp3,354GPL-3.0 circom-proverCircom prover is a Rust library for generating and verifying proofs for Circom circuits.13,211MIT OR Apache-2.0 circom-scotiaMiddleware to compile Circom circuits to Bellperson8,433MIT OR Apache-2.0 circom-witness-rsFast witness generator for Circom circuits83,702MITCryptography circom-witnesscalcWitness calculator for Circom circuits164,634MIT OR Apache-2.0 circomkit-rsA Circom testing & development environment for Rust25MITCryptographyDevelopment tools::Testing circomspectA static analyzer and linter for the Circom zero-knowledge DSL20,192LGPL-3.0-only circomspect-circom-algebraSupport crate for the Circomspect static analyzer8,393LGPL-3.0-only circomspect-parserSupport crate for the Circomspect static analyzer13,146LGPL-3.0-only circomspect-program-analysisSupport crate for the Circomspect static analyzer16,007LGPL-3.0-only circomspect-program-structureSupport crate for the Circomspect static analyzer15,153LGPL-3.0-only circos-rsCircos - circular data visualization, ported from Perl to Rust21MITCommand line utilitiesScience circuitStatic dataflow computation circuits1,760MIT circuit_breakerA Rust implementation of the Circuit Breaker pattern for building resilient and fault-tolerant systems.24,371Apache-2.0 circuit_definitionsZKsync Era circuits definitions341,730MIT OR Apache-2.0Cryptography circuit_encodingsZKsync Era circuits encodings1,158,715MIT OR Apache-2.0Cryptography circuit_playground_expressBoard Support crate for the Adafruit Circuit Playground Express19,298MIT OR Apache-2.0Embedded developmentHardware support circuit_sat_checkSimple utility to generate circuit checking to CNF formula.810Apache-2.0MathematicsScience circuit_sequencer_apiZKsync Era circuit API for sequencer1,351,671MIT OR Apache-2.0Cryptography circuitbreakerwrap expensive function calls to fail quickly2,969 circuitbreaker-rsA production-grade, zero-boilerplate, lock-efficient, observability-ready Circuit Breaker library732,670MIT OR Apache-2.0API bindingsAsynchronous circuitpython-deployFast, reliable CircuitPython project deployment tool1,316MITCommand line utilitiesDevelopment tools circulant-rsHigh-performance block-circulant tensor operations using FFT85MIT OR Apache-2.0AlgorithmsMathematics circularA stream abstraction designed for use with nom5,968,129MIT circular-arrayA circular array that allows infinite pushes into a fixed-size array.6,625MIT circular-bufferEfficient circular buffer implementation3,747,017BSD-3-ClauseData structuresNo standard library circular-queueA circular buffer-like queue.1,826,489MIT/Apache-2.0Data structures circular-resourcesA `Vec` together with a position that moves circularly26,352Apache-2.0 circular_doubly_linked_listA high-performance Circular Doubly Linked List implementation in Rust22MITData structures circular_vecA fixed length vector that provides a next function that loops infinitely3,318MIT circularbufRust fixed size circular (ring) buffer825MIT OR Apache-2.0Data structuresNo standard library circularingCircular buffer backed by in-stack storage.11,919MIT circulateLightweight PubSub framework that supports both sync and async57,334MIT OR Apache-2.0Asynchronous circuloCircleCI API v2 client library and CLI1,615AGPL-3.0-or-later circusUmbrella crate for Circus components3,019MPL-2.0 circus-agentBuild agent for Circus job execution53MPL-2.0 circus-binary-cacheNix binary cache primitives used by Circus130MPL-2.0 circus-cliCommand-line client for Circus54MPL-2.0 circus-commonShared models and utilities for Circus124MPL-2.0 circus-configConfiguration loading and validation for Circus139MPL-2.0 circus-evaluatorNix evaluation support for Circus50MPL-2.0 circus-logsLogging helpers for Circus146MPL-2.0 circus-migrationsDatabase migrations for Circus130MPL-2.0 circus-nixNix data types and helpers for Circus130MPL-2.0 circus-notificationNotification delivery for Circus91MPL-2.0 circus-protoCap'n Proto RPC bindings for Circus92MPL-2.0 circus-queue-runnerQueue runner for Circus builders55MPL-2.0 circus-s3S3 signing helpers for Circus78MPL-2.0 circus-serverHTTP server for Circus52MPL-2.0 circus-typesShared type definitions for Circus153MPL-2.0 circus_buggifyA Rust port of the Buggify macro from FoundationDB1,683MIT OR Apache-2.0Simulation circus_simulationSimulation framework inspired by FoundationDB1,769MIT OR Apache-2.0Simulation circus_testProcedural macro to inject a seed in your tests3,037MIT OR Apache-2.0Development tools::TestingSimulation ciriSimple game engine using three-d507MITGame developmentGame engines ciri-toolkitHigh-performance circRNA detection and isoform reconstruction toolkit39GPL-2.0-or-laterCommand line utilitiesScience cirilicaSimple library to traslate from serbian latin to serbian cyrillic5,577MIT cirious_codexA unified, next-generation modular toolset and facade framework providing config, logging, diagnostics, CLI scaffolding, and…16MIT OR Apache-2.0AsynchronousDevelopment tools cirious_codex_cliPremier entrypoint library for building production-ready CLIs and microservices in the Cirious ecosystem, with automated argument…46MIT OR Apache-2.0Command-line interfaceCommand line utilities cirious_codex_configA robust, foundational configuration management framework for the Cirious ecosystem.92MIT OR Apache-2.0ConfigurationDevelopment tools cirious_codex_loggerStructured logging library for the Cirious Codex ecosystem.175MIT OR Apache-2.0Command-line interfaceDevelopment tools::Debugging cirious_codex_metricsMetrics collection, aggregation, and visualization utilities for the Cirious ecosystem.30MIT OR Apache-2.0Development toolsDevelopment tools::Profiling cirious_codex_resultRobust result and error handling framework for the Cirious Codex ecosystem.176MIT OR Apache-2.0Development tools::DebuggingRust patterns cirious_codex_termNext-generation native ANSI terminal control and formatting.224MIT OR Apache-2.0Command-line interface cirnoA command-line application that displays random motivational phrases in Japanese and Russian to brighten your day443MITCommand line utilities cirno_storeA library containing motivational phrases in Japanese and Russian609MITData structures cirq-astCirq language AST types and CST-to-AST lowering213BSD-3-ClauseCompilersParser implementations cirq-control-grammarTree-sitter grammar for the ngspice .control scripting language78BSD-3-ClauseParser implementations cirq-frontendCirq frontend pipeline: source → AST → IR → Netlist108BSD-3-ClauseCompilersParser implementations cirq-grammarTree-sitter grammar for the Cirq circuit description language143BSD-3-ClauseParser implementations cirq-irCanonical Cirq IR — the resolved, validated semantic representation171BSD-3-ClauseCompilersData structures cirq-spice-importSPICE netlist to Cirq IR converter96BSD-3-ClauseParser implementationsScience cirqueUnidirectional, circular, lock/wait-free SPSC queue with unbounded capacity.1,681MPL-2.0ConcurrencyData structures cirque-pinnacledriver for working with Cirque Pinnacle Glidepoint touchpads on embedded systems1,418MITAPI bindingsEmbedded development cirroMinimal SSR and caching extension for web frameworks60MIT cirru_ednParser/Writer for Cirru EDN116,989MIT cirru_parserParser for Cirru text syntax80,964MIT cirrusAn ergonomic Rust HTTP client for the Salesforce REST API.210MITAPI bindingsWeb programming::HTTP client cirrus-authSalesforce OAuth 2.0 authentication flows for the Cirrus SDK.275MITAPI bindingsAuthentication cirrus-metadataSalesforce Metadata API (SOAP) client for the Cirrus SDK.103MITAPI bindings cirtraceTool for debugging and tracing VoIP call on a Cirpack platform11,756MIT ciruelaA peer-to-peer synchronization software for servers in datacenters.83,800MIT/Apache-2.0Command line utilitiesDevelopment tools ciruncirun.io1,550MIT cirun-agentCirun on-prem agent: provisions and manages CI/CD runners via Docker, Meda (Linux KVM VMs), and Lume (macOS VMs).30MITCommand line utilitiesDevelopment tools cisakContainer Installation - Swiss Army Knife: automates download, verification, and installation of runc, CNI plugins, and containerd263MITCommand line utilitiesDevelopment tools cisatCognitively-Inspired Simulated Annealing Teams14,482MITMathematicsScience ciscoReserved.24Apache-2.0 cisco-loggerUtility for parsing and coloring cisco RFC 3164 syslog messages2,991GPL-2.0Command line utilities cisco-platformReserved.22Apache-2.0 cisco-platform-privateReserved.22Apache-2.0 cisco-platform-sdkReserved.22Apache-2.0 cisco-privateReserved.23Apache-2.0 cisco-sdkReserved.23Apache-2.0 cisco-sdk-privateReserved.23Apache-2.0 cisco_decryptSimple tool to decrypt Cisco Type 7 passwords2,898MIT ciscoplatformReserved.22Apache-2.0 ciscoplatforminternalReserved.25Apache-2.0 ciscoplatformprivateReserved.22Apache-2.0 ciscoplatformsdkReserved.23Apache-2.0 ciscosdkReserved.24Apache-2.0 ciseaux_clientJust a Redis Pool implementation8,790MIT cismuteSafely transmute type to itself in generic contexts4,947BSD-2-Clause-PatentNo standard libraryRust patterns cisnessRuntime 'live witness' of two types being the same3,956MPL-2.0No standard library::No dynamic allocationRust patterns cisoLibrary for CISO image compression and decompression15,346MIT AND BSD-3-Clause cistell-coreConfiguration library with field provenance and secret support — core engine1,218MITConfiguration cistell-macrosConfiguration library with field provenance and secret support — derive macros1,257MITConfiguration cisternA high-level, asynchronous storage abstraction layer built for AI-driven applications, LLM orchestrators, and local agents.34MITDevelopment toolsRust patterns cistringA string type that preserve case, but compares insensitiveley.4,241MIT OR Apache-2.0Data structuresText processing citaA Git-friendly bibliography database94MITCommand line utilitiesScience cita-bibliographyCanonical BibTeX storage for Cita140MITCommand line utilitiesScience cita-coreLocator parsing and identifier normalization for Cita158MITCommand line utilitiesScience cita-cryptoA switch to choice algorithm, secp256k1, ed25519, sm23,229Apache-2.0 cita-crypto-traitA library library define cryptography interface8,146Apache-2.0 cita-databaseDatabase for CITA.15,667Apache-2.0 cita-documentsDocument download and cache management for Cita114MITCommand line utilitiesScience cita-ed25519A library library provide ed25519 cryptography method2,464Apache-2.0 cita-evmCITA VM11,309Apache-2.0 cita-ewasmCITA VM1,915Apache-2.0 cita-extra-utilcita-ee extra util public library1,756Apache-2.0 cita-hashableProvide a switch to choice algorithm7,609Apache-2.0 cita-hasherPackage hasher provides a Hasher trait.113MIT cita-inspire-clientINSPIRE literature client for JSON metadata and authoritative BibTeX132MITAPI bindingsScience cita-loggerLogger for CITA.17,136Apache-2.0 cita-manifestAuthoritative source-snapshot storage for Cita116MITCommand line utilitiesScience cita-merklehashProvide merkle tree construction method3,132Apache-2.0 cita-secp256k1A library library provide secp256k1 cryptography method5,029Apache-2.0 cita-sm2A library library provide sm2 cryptography method4,969Apache-2.0 cita-snappyA library provide compress method10,817Apache-2.0 cita-stateCITA VM11,360Apache-2.0 cita-toolbasic method for cli6,089MIT cita-typesA library wrapping cita types10,991Apache-2.0 cita-utilcita utility library2,995Apache-2.0 cita-vmCITA VM27,455Apache-2.0 cita_cloud_protocita-cloud proto library37,900Apache-2.0 cita_trieModified Patricia Tree (aka Trie).477,504Apache-2.0 citadelInterdependant, general-purpose library for slice manipulation3,189 citadel-apiThe api for the citadel compiler backend4,352MIT citadel-appsHandle Citadel app.yml files7,130AGPL-3.0-or-later citadel-backendThe backend/codegenerator of the citadel compiler backend4,642MIT citadel-crudCreate tangible CRUD components for concern separation and dependency injection. Currently only works with SqlLite4,504MIT citadel-frontendThe frontend of the citadel compiler backend7,237MIT citadel-middleendThe middleend/optimizer for the citadel compiler backend3,495MIT citadel-runtimeBitcoin, LN & RGB wallet runtime2,678MIT citadel_cryptHigher-level cryptographic library for the Citadel Protocol15,999MIT OR Apache-2.0AsynchronousCryptography citadel_ioUnderlying runtime for interfacing with I/O for std/wasm targets17,828MIT OR Apache-2.0AsynchronousCryptography citadel_io_macrosProcedural macros for citadel_io (the ErrorRegistry derive)160MIT OR Apache-2.0AsynchronousCryptography citadel_logginglogging library for the Citadel Protocol19,646MIT OR Apache-2.0AsynchronousCryptography citadel_pqcryptoLower-level cryptographic library for the Citadel Protocol16,521MIT OR Apache-2.0AsynchronousCryptography citadel_protoNetworking library for the Citadel Protocol10,839MIT OR Apache-2.0AsynchronousCryptography citadel_sdkHigh-level library to build applications on the Citadel Protocol9,874MIT OR Apache-2.0AsynchronousCryptography citadel_treekemPost-quantum TreeKEM continuous group key agreement (CGKA) for zero-trust group messaging40MIT OR Apache-2.0CryptographyNetwork programming citadel_typesTypes for the citadel protocol8,935MIT OR Apache-2.0AsynchronousCryptography citadel_userUser backend library for the Citadel Protocol14,550MIT OR Apache-2.0AsynchronousCryptography citadel_wireNAT traversal and wire support for the Citadel Protocol14,912MIT OR Apache-2.0AsynchronousCryptography citadeldbCitadel: encrypted-first embedded SQL/vector database, the foundation of the Citadel memory engine for AI agents1,153MIT OR Apache-2.0CryptographyDatabase interfaces citadeldb-aiAutonomous agent runtime for Citadel: ReAct + Reflexion + memory-backed plan caching228MIT OR Apache-2.0API bindingsArtificial intelligence citadeldb-bufferBuffer pool with SIEVE eviction and encrypt/decrypt pipeline for Citadel1,558MIT OR Apache-2.0CachingCryptography citadeldb-cliInteractive SQL shell for Citadel encrypted database603MIT OR Apache-2.0Command line utilitiesDatabase interfaces citadeldb-coreCore types, errors, and constants for Citadel encrypted database1,950MIT OR Apache-2.0CryptographyDatabase interfaces citadeldb-cryptoCryptographic primitives for Citadel: AES-256-CTR + HMAC-SHA256, key management, Argon2id1,658MIT OR Apache-2.0AlgorithmsCryptography