All 305,250 crates, alphabetically

quitherA flexible enum-based utility for representing values that may be on the left, right, neither, or both sides.4,202Apache-2.0Data structuresRust patterns quither-proc-macrosA proc-macro for the quither crate.1,244Apache-2.0 quittersList dependencies of a Rust binary by parsing panic messages6,856,503MIT OR Apache-2.0Parsing tools quiverA schema specification and validator for Arrow record batches33,814MIT OR Apache-2.0Data structuresEncoding quiver-agentBackground daily-task agent that observes Claude Code sessions and writes hint files117MIT OR Apache-2.0 quiver-cliLocal tool registry, recommender, and background agent for Claude Code44MIT OR Apache-2.0Command line utilitiesDevelopment tools quiver-coreDomain types and traits for the quiver workspace269MIT OR Apache-2.0 quiver-dspA modular audio synthesis library using Arrow-style combinators and graph-based patching13MITGame developmentMultimedia::Audio quiver-h3Implementation of RFC 9113 HTTP/31,562MIT quiver-ingestionSkill, plugin, MCP, GitHub, and session JSONL ingestion parsers for quiver181MIT OR Apache-2.0 quiver-mcp-serverrmcp stdio MCP server exposing quiver tools to Claude Code77MIT OR Apache-2.0 quiver-qpackImplementation of RFC 9204 QPACK3,248MIT quiver-recommenderHybrid FTS + sqlite-vec cosine recommender with success-rate reranker for quiver211MIT OR Apache-2.0 quiver-storageSQLite + sqlite-vec + FTS5 storage layer with refinery migrations and r2d2 pool for quiver242MIT OR Apache-2.0 quiver-webLoopback axum + askama + htmx web UI for quiver75MIT OR Apache-2.0 quiver_deriveProc-macros for the quiver crate31,523MIT OR Apache-2.0Data structuresEncoding quiver_typesCore types for the quiver crate31,837MIT OR Apache-2.0Data structuresEncoding quiverdb-cliQuiver command-line interface and single-binary entrypoint.337AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-clusterOpt-in cluster-mode primitives for Quiver (ADR-0065): static shard map, rendezvous (HRW) id hashing, and the scatter-gather…399AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-coreQuiver's storage engine: pages, WAL, manifest, segments, and recovery.733AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-cryptoAudited-cryptography wrappers for Quiver (no custom primitives).550AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-embedThe embeddable, in-process Quiver database handle.605AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-importMigration importers: load Qdrant / Chroma / pgvector exports into Quiver.415AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-indexVector indexes for Quiver: HNSW now; DiskANN/Vamana and IVF later.659AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-mcpAn MCP server exposing Quiver's capabilities as agent tools.446AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-protoWire types for Quiver: the gRPC service contract and generated code.472AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-providersOpt-in, provider-agnostic embedding & rerank adapters shared by the Quiver server and MCP server (ADR-0047/0058).548AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-queryQuiver's query planner and hybrid filtered search.658AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-serverThe Quiver daemon: gRPC + REST with auth, RBAC, audit, and metrics.421AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-simdSIMD distance kernels for Quiver.699AGPL-3.0-onlyData structuresDatabase interfaces quiverdb-tuiThe Quiver retro terminal cockpit (an API client).500AGPL-3.0-onlyData structuresDatabase interfaces quiverquantA crate for accessing the QuiverQuant API.5,449MITAPI bindingsAsynchronous quivoraA peer-to-peer tunnel powered by QUIC.16MITNetwork programming quixDistribution layer for actix8,026MIT quix-buildQuix: Distribution layer for actix (build script support)cd ..6,339MIT quix-deriveDerive macro for generation quix::ProcessDispatch8,950MIT quixoteQuizzes and tests in Markdown17,795MIT quixotica quixotic project1,8490BSD quixotic-plecostomusA framework to build fast, reliable and programmable networked systems at Internet scale.19Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-boringsslBoringSSL async APIs for Pingora.75Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-cacheHTTP caching APIs for Pingora proxy.5,077Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-corePingora's APIs and traits for the core network protocols.5,218Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-errorError types and error handling APIs for Pingora.5,273Apache-2.0Rust patterns quixotic-plecostomus-header-serdeHTTP header (de)serialization and compression for Pingora.5,089Apache-2.0Compression quixotic-plecostomus-httpHTTP request and response header types for Pingora.5,234Apache-2.0Web programming quixotic-plecostomus-ketamaRust port of the nginx consistent hash function57Apache-2.0AlgorithmsCaching quixotic-plecostomus-limitsA library for rate limiting and event frequency estimation31Apache-2.0Algorithms quixotic-plecostomus-load-balancingCommon load balancing features for Pingora proxy.44Apache-2.0Network programming quixotic-plecostomus-lruLRU cache that focuses on memory efficiency, concurrency and persistence.5,089Apache-2.0AlgorithmsCaching quixotic-plecostomus-memory-cacheAn async in-memory cache with cache stampede protection.20Apache-2.0AlgorithmsCaching quixotic-plecostomus-opensslOpenSSL async APIs for Pingora.75Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-poolA connection pool system for connection reuse.5,224Apache-2.0Network programming quixotic-plecostomus-prometheusA Prometheus metrics HTTP server for pingora services.44Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-proxyPingora HTTP proxy APIs and traits.5,064Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-runtimeMultithreaded Tokio runtime with the option of disabling work stealing.5,226Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-rustlsRusTLS async APIs for Pingora.5,209Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-s2nS2N async APIs for Pingora.75Apache-2.0AsynchronousNetwork programming quixotic-plecostomus-timeoutHighly efficient async timer and timeout system for Tokio runtimes.5,246Apache-2.0Asynchronous quixotic-plecostomus-tinyufoIn-memory cache implementation with TinyLFU as the admission policy and S3-FIFO as the eviction policy36Apache-2.0AlgorithmsCaching quixutilsCommon helpers and utils45,260Apache-2.0Rust patterns quizCLI Prompts crate5,055MIT quizasQuizás, Quizás, Quizás13,558MIT quizerA simple library for storing quiz data in a binary file format1,176non-standard quizlerOffline quiz game2,860MIT quizxQuantum Circuit Optimisation and Compilation using the ZX-calculus8,844Apache-2.0Science quizzerA simple library for storing quiz data in a binary file format5,153GPL-3.0 quizzicalTerminal quiz game for cert exam prep. Beat mode, combo scoring, burning fuse timer. Security+ deck included.270MITCommand line utilitiesGames qukita quantum simulator for rust and wasm5,852MIT qulacs-bridgeHigh level bindings to Qulacs the Quantum Circuit Simulator4,816Apache-2.0 qunitExperimental uom-like library which enables compile-time verification of dimensional analysis, with support for statically-sized…23,144Apache-2.0 qunit-macrosMacros for qunit.10,140Apache-2.0 qunitxFast QUnit/QUnitX browser test runner26MIT qunreliableDatagram transmission of gm-quic5,812Apache-2.0AsynchronousNetwork programming quo-rustCompanion package for the Quo debugger.282GPL-3.0-onlyDevelopment toolsDevelopment tools::Debugging quocktailRust CLI for searching through nested directories of markdown files with frontmatter, filtering and displaying the results9,301GPL-3.0-or-later quoinReserved name for the Quoin programming language — a Smalltalk-inspired language on a Rust VM. Work in progress; nothing to use…37MIT OR Apache-2.0Development tools quoin-extExtension-side SDK for writing out-of-process Quoin extensions (Tier 1, UDS transport).13MIT OR Apache-2.0 quoin-ext-protoWire types + hand-rolled MessagePack codec for the Quoin out-of-process extension protocol (Tier 1). The byte-level contract is…16MIT OR Apache-2.0 quokkaA new framework for building old-school fullstack web applications2,331MIT quokka-adminAn admin panel for quokka683MIT quokka-admin-macrosAn admin panel for quokka877MIT quokka-commandA new framework for building old-school fullstack web applications301MIT quokka-configConfigure modular states in Quokka1,395MIT quokka-databaseA new framework for building old-school fullstack web applications565MIT quokka-handlerHandler helpers for Quokka301MIT quokka-jobA new framework for building old-school fullstack web applications293MIT quokka-macrosMacros for Quokka crates3,591MIT quokka-mailingA new framework for building old-school fullstack web applications292MIT quokka-migrationA new framework for building old-school fullstack web applications428MIT quokka-pouchA new framework for building old-school fullstack web applications945MIT quokka-sessionA new framework for building old-school fullstack web applications296MIT quokka-stateStates with dependencies used for Quokka1,176MIT quokka-templatingProvides the templating engine and basic helpers for Quokka440MIT quokkasimA Rust-based Discrete Event Simulation (DES) framework, which simplifies simulation for beginners, and provides excellent…3,030non-standardAsynchronousScience quokkasim_derive_macrosDerive macros for the QuokkaSim simulation framework.1,860non-standard quokkasim_reexportsRe-exports used in QuokkaSim crates356non-standard quollDisplay custom icons on system tray4,495GPL-3.0+ quoracleA library for constructing and analyzing read-write quorum systems152MIT OR Apache-2.0AlgorithmsMathematics quorkA collection of small things that don't deserve their own crate83,484MIT OR Apache-2.0Development toolsOperating systems quork-procThe proc macros for quork (not intended for independant use)64,358MIT quorumMulti-agent orchestrator with governance-first consensus25MIT or Apache-2.0 quorum-cliQuorum CLI: the quorum binary.82Apache-2.0Command line utilitiesDevelopment tools quorum-coreQuorum core: review pipeline, bundle assembly, JSON archive. Synchronous; no async runtime, no HTTP client.141Apache-2.0Development tools quorum-crypto-coreCryptographic primitives and traits for agent signing and verification (ed25519, secp256k1, SHA3)627Apache-2.0 OR MITAuthenticationCryptography quorum-lippa-clientQuorum Lippa API client: cookie auth, Consensus sessions, keyring storage.121Apache-2.0API bindingsDevelopment tools quorum-rsRust SDK and CLI for multi-agent deliberation systems — ships the `quorum` binary (run / status / trace / tui / init) plus the…467Apache-2.0 OR MITAPI bindingsCommand line utilities quorum-setHierarchical quorum trees with deterministic canonical IDs53Apache-2.0AlgorithmsData structures quorum-squads-corePure Rust, wasm32-wasip2 friendly Solana core for ZeroClaw tool plugins: base58, PDAs, legacy tx construction, Squads v4 encoding…35MITCryptography::CryptocurrenciesWebAssembly quorum-vault-clientA Rust client for Quorum Vault Plugin7,497MIT quorumragQuorum-based retrieval-augmented generation: fuse multiple retrievers and keep only the evidence they agree on.22MIT OR Apache-2.0ScienceText processing quorumsRust implementation of Gorums gRPC quorum framework20MIT quorums-buildBuild-time code generator for the quorums gorums-style RPC framework48MIT quotA fast and flexible command-line tool that converts text input into escaped string literals520Elastic-2.0Command line utilitiesText processing quotaFastest Lane-parallel Rate-limiter for Rust404MIT quota-layerA quota layer for OpenDAL.57MIT OR Apache-2.0Filesystem quotachecker-tuiAI Agent Quota Monitoring TUI dashboard114MIT quotailA terminal stock-market dashboard with live data and an MCP server that lets Claude read your watchlist and drive the TUI.59MIT OR Apache-2.0Command line utilitiesVisualization quotasCLI that auto-detects AI provider credentials (Claude, Codex, MiniMax, Kimi, Z.ai, Grok/xAI, …) and shows your usage quotas in a…243Unlicense OR CC0-1.0Command line utilities quotchFast cross-platform CLI for AI coding-agent usage limits83MITCommand line utilities quoteQuasi-quoting macro quote!(...)1,379,419,074MIT OR Apache-2.0Development tools::Procedural macro helpers quote-aliasA helper macro for easily reusing static token streams5,460MIT OR Apache-2.0Development tools::Procedural macro helpers quote-cliDisplays quotes160GPL-2.0 quote-dataA tokenization Library for Rust1,291MIT OR Apache-2.0 quote-data-codegenInternal codegen for quote-it1,583MIT OR Apache-2.0 quote-data-helpersInternal functions, struct for quote-it1,849MIT OR Apache-2.0 quote-doctestA simple doctest generator for quote12,062MIT OR Apache-2.0Development tools::Procedural macro helpers quote-generatorThis project is a `.deb` package for generating random quote thanks to the `dummyjson` API2,359MIT quote-impersonatedQuasi-quoting macro quote!(...)8,168MIT OR Apache-2.0Development tools::Procedural macro helpers quote-implAnything that needs to be factored out of the quote crate1,361MIT OR Apache-2.0 quote-itA quoting utility in the terminal1,262non-standardCommand line utilities quote-it-codegenInternal codegen for quote-it987MIT OR Apache-2.0 quote-it-helpersInternal functions, struct for quote-it1,018MIT OR Apache-2.0 quote-nextQuasi-quoting macro quote!(...)7,109MIT OR Apache-2.0Development tools::Procedural macro helpers quote-respannedChange the spans of tokens.41UnlicenseDevelopment toolsNo standard library quote-useSupport `use` in procmacros hygienically26,745,699MITDevelopment tools::Procedural macro helpersParsing tools quote-use-macrosSupport `use` in procmacros hygienically26,351,801MITDevelopment tools::Procedural macro helpersParsing tools quote2An alternative lightweight version of quote52,543MIT quote2-macrosAn alternative lightweight version of quote52,340MIT quote_intoEasily & efficiently generate code by quoting it in a macro115,710MIT OR Apache-2.0Development tools::Procedural macro helpers quote_into_macroProcedural macros for `quote_into`. Do not use directly.116,280MIT OR Apache-2.0 quote_preciseA quote implementation that preserves meaningful span locations10,031MIT OR Apache-2.0 quotedA simple CLI program to print a random quote from a JSON list.4,072MIT quoted-stringSpecification independent utilities to handle quoted strings (in Mail, MIME types, ..)3,811,368MIT/Apache-2.0Encoding quoted-string-parserQuoted string parser for grammar defined in RFC3261641,176MIT/Apache-2.0Text processing quoted-valuesQuoted values parser20Apache-2.0/MITNo standard libraryScience quoted_printableA simple encoder/decoder for quoted-printable data31,204,9590BSDEmailParsing tools quoted_stringsProvides an iterator through quoted strings.4,673MIT quotelnhttps://twitter.com/davidtolnay/status/14784166362061045761,181MIT OR Apache-2.0 quotemetaShell-quoting, à la Perl's `quotemeta` function.4,181MITCommand line utilities quotesRequest tick、stock_list msgs4,423MIT quotesdirectlibCQG Quotes Direct API bindings for Rust824MITAPI bindingsNetwork programming quothQuoth is a scannerless (no-lexing), developer-friendly parsing library for implementing DSLs and syntax parsers in Rust51,948MIT quoth-macrossupport macros for quoth51,038MIT quotickEmbedded tick market data (trade, quote, ..) database storage optimized for billions of data points.10,185non-standard quotient-filterA quotient filter implementation.9,968MITAlgorithmsData structures quotient-setquotient-set a compated datastucture21MITData structures quotySimple CLI program that returns a programming quote10,315MITCommand line utilities quplaRust implementation of the IOTA QuPLa (Qubic Programming Language).1,775GPL-3.0 QuqqU_mgrepddddd3,019MIT OR Apache-2.0 ququmatzZero-dependency io_uring bindings via raw syscalls, no libc460MITNo standard libraryOperating systems::Linux APIs quranQuran1,551MIT quran-refDisplay the verses of the quran in various english translations using references5,080MITCommand line utilities quranizeEncoding transliterations into Quran forms.50,088Apache-2.0 quriustA Rust library to simulate a quantum computer. Only for quriust ones.12,539MIT qurlQuick command-line HTTP request utility written in Rust2,964MITAPI bindingsCommand line utilities qurliLightweight terminal UI HTTP client62MITCommand line utilities quropTurn Linux applications into Quake-style dropdowns.1,552MPL-2.0Command line utilities qurox-pqQuantum-ready cryptographic SDK with hybrid classical and post-quantum algorithms55Apache-2.0Cryptography qursQulacs implementation in Rust8,285MIT qurustCollection of modules used for working with quantum programs and circuits2,723MITScience qusb2snes-clientClient for Qusb2snes websocket interface18,074MIT qusql-mysqlAsync mysql connector1,192Apache-2.0 qusql-mysql-typeTyped macroes for qusql-mysql1,266Apache-2.0 qusql-mysql-type-macroProc macros for qusql-mysql-type1,378Apache-2.0 qusql-parseParser for sql4,397Apache-2.0 qusql-sqlx-typeTyped sql macros for sqlx2,305Apache-2.0 qusql-sqlx-type-macroProc macros for sqlx-type2,439Apache-2.0 qusql-typeTyper for sql4,022Apache-2.0 qustA crate for finance quantative reserach6,761MIT OR Apache-2.0 qust-apia part of crate qust2,183MIT OR Apache-2.0 qust-derivea part of crate qust3,362MIT OR Apache-2.0 qust-dsa part of crate qust4,114MIT OR Apache-2.0 qust-ioa part of crate qust2,189MIT OR Apache-2.0 qust-straa part of crate qust1,916MIT OR Apache-2.0 qutbqutb280MIT OR Apache-2.0 qutedesignify your terminal with a large ansi colors palette 🎨21,484MITCommand-line interfaceDevelopment tools quteeA quadtree implementation5,610MIT OR Apache-2.0Data structures qutescriptA tiny library for writing qutebrowser userscripts in Rust.1,665MIT qutexSynchronization mechanisms that rely on lock-free and other non-(thread)blocking techniques, such as Rust futures, to guarantee…773,987MITAsynchronousConcurrency qutoniumsimplify unit testing with a functional testing framework 📈11,731MITDevelopment tools::Testing quuidQUick UUID generator that digs your clipboard.1,796MIT quuidyThe simplest UUID v4 && v7 generation cli tool out there.3,998MIT qux-pqcPost-Quantum Cryptography library implementing NIST FIPS 203 (ML-KEM) and FIPS 204 (ML-DSA)35MIT OR Apache-2.0CryptographyNo standard library qvquickly view your data13,852Apache-2.0 qv-coreSigvault — post-quantum cryptographic tokens (ML-DSA-87 + Falcon-512/1024, XChaCha20-Poly1305, SHA3-256, mutation-chain replay…147Apache-2.0 OR AGPL-3.0-onlyAuthenticationCryptography qvapay-sdkUn SDK en Rust para la API de Pagos QVAPAY54MITAPI bindings qvassA quantum circuit simulator in Rust.801MIT OR Apache-2.0 qvcmRegister-based bytecode VM with quantum computing functionality68Apache-2.0 qvdHigh-performance library for reading, writing and converting Qlik QVD files with Parquet/Arrow/DataFusion support1,943MITCommand line utilitiesEncoding qvekconvenient GLSL-style casts for vek534MIT