All 305,250 crates, alphabetically

otrotr decodes and cuts video files that were downloaded from Online TV Recorder <https://onlinetvrecorder.com/>12,664GPL-3.0-or-laterCommand line utilitiesEncoding otr-utilsUtilities for decoding and cutting video files that were downloaded from Online TV Recorder <https://onlinetvrecorder.com/>11,200GPL-3.0-or-laterEncodingMultimedia::Video otrrotrr — OTR protocol version 3 and 46,954LGPL-3.0-only otsPlease do not use this. Use opentimestamps instead.7,968CC0-1.0 ots-clientBluetooth Object Transfer Service (OTS) Client command-line tool.5,182MIT OR Apache-2.0Command line utilities ots-coreBluetooth Object Transfer Service (OTS) core.2,576MIT OR Apache-2.0API bindingsHardware support otsogOn The Shoulders of Giants – See how much of your project is really yours19MITCommand line utilitiesDevelopment tools otspecUtility library for reading/writing OpenType data structures4,864Apache-2.0 otspec_macrosProcmacro library for reading/writing OpenType data structures5,562Apache-2.0 otspotMathematical optimization solver — LP (Revised Simplex) and QP (Interior Point / Mehrotra predictor-corrector)235AGPL-3.0-onlyAlgorithmsMathematics otspot-coreCore implementation for otspot (LP/QP/MIP solver) — published as a dependency of the otspot facade399AGPL-3.0-only otspot-ioFile I/O (MPS/QPS/QPLIB) for the otspot solver278AGPL-3.0-only otspot-modelAlgebraic modeling API for otspot (Model, Variable, Expression, Constraint)279AGPL-3.0-only ottavinoFork of `piccolo` with extended standard library.10,901MIT ottavino-gc-arenasafe, incrementally garbage collected arenas (updated fork of gc-arena)10,951MIT ottavino-gc-arena-deriveproc-macro support for gc-arena11,009MIT ottavino-utilUtilities for the `ottavino` library10,760MIT otterOtter game system; main data structures Rust crate.17,433AGPL-3.0-or-later otter-api-testsOtter game system; API tests crates.12,779AGPL-3.0-or-later otter-baseOtter game system; WASM/hostside common code crate.19,080AGPL-3.0-or-later otter-cliOtter game system; command line game management client.8,602AGPL-3.0-or-later otter-daemonOtter game system; server executable crate.10,972AGPL-3.0-or-later otter-engineOtter JavaScript engine272MITCompilersDevelopment tools otter-jsc-coreSafe Rust wrappers for JavaScriptCore435MITDevelopment toolsWebAssembly otter-jsc-sysRaw FFI bindings to JavaScriptCore496MITDevelopment toolsExternal FFI bindings otter-nifWrite Erlang NIFs in Rust. Direct mapping of the NIF C ABI with compile-time lifetime safety and no hidden magic.35MIT OR Apache-2.0API bindingsExternal FFI bindings otter-nif-macrosProcedural macros for otter-nif (Erlang NIFs in Rust). Re-exported through otter-nif; not used directly.70MIT OR Apache-2.0API bindingsExternal FFI bindings otter-nodeNode.js API layer for Otter181MITAPI bindingsDevelopment tools otter-nodejs-testsOtter game system; JavaScript out-of-browser test support.6,223AGPL-3.0-or-later otter-pmNPM-compatible package manager for Otter146MITCommand line utilitiesDevelopment tools otter-runtimeJavaScriptCore runtime for otter - TypeScript/JavaScript execution engine365MITCompilersDevelopment tools otter-solana-verifyOtterSec Solana formal verification macros3,855MIT otter-sql🦦 An Embeddable SQL Executor4,093MIT OR Apache-2.0Database interfaces otter-supportOtter game system; support code Rust crate.7,982AGPL-3.0-or-later otter-wasmOtter game system; Rust WASM crate.10,997AGPL-3.0-or-later otter-webdriver-testsOtter game system; API tests crate.10,970AGPL-3.0-or-later otter_dcAdd awesome decorations to your Discord Avatar890MIT otter_satA library for determining the satisfiability of boolean formulas written in conjunctive normal form, developed to support…2,193AGPL-3.0-or-laterMathematicsScience otterbook_coreA high-performance, lock-free price level implementation for limit order books in Rust. This library provides the building blocks…495MITData structuresFinance otterjsOtter CLI - A fast TypeScript/JavaScript runtime64MITCommand line utilitiesDevelopment tools ottermOtterm — the output librarian. Run commands through it, never lose their output again.29MIT otters-rsHigh-performance vector search with metadata filtering875MITAlgorithmsData structures ottoOtto: a unified approach to CRDTs and OT1,639MIT OR Apache-2.0 otto-cliTask runner with retries, timeouts, history, and notifications40MITCommand line utilitiesDevelopment tools otto-testOtto: a unified approach to CRDTs and OT1,567MIT OR Apache-2.0 otto_vecExposes the trait that can automatically vectorize pure functions.1,657MIT otto_vec_deriveThe back-end for otto_derive2,529MIT ottotomConversion of OpenTelemetry metrics to OpenMetrics Text format68Apache-2.0 ottotom-testsupportTest helpers used for the ottotom crate tests69Apache-2.0 ottrA highly parallel game engine900MIT OR Apache-2.0Game enginesGraphics ottr_mainUtilities for defining the main loop of an Otter application1,115MIT OR Apache-2.0 ottr_windowA windowing library for Otter884MIT OR Apache-2.0 otx-formatThe open transaction format5,507MIT otx-poolThe open transaction pool service core2,098MIT otx-pool-clientThe open transaction pool util client2,068MIT otx-pool-configThe open transaction pool util config5,004MIT otx-pool-plugin-atomic-swapThe open transaction pool plugin atomic swap2,622MIT otx-pool-plugin-dust-collectorThe open transaction pool plugin dust collector2,050MIT otx-pool-plugin-protocolThe open transaction pool plugin protocol5,027MIT otx-pool-plugin-signerThe open transaction pool plugin signer2,104MIT otx-sdkThe open transaction related sdk4,046MIT ouHelps you serve a static site, single page application or just a static file10,035MPL-2.0Command line utilitiesDevelopment tools ouaiA yes like command that simulate typed text1,585MIT oubliLibrary for generating documentation websites with Maudit.1,982MIT ouchA command-line utility for easily compressing and decompressing files and directories.45,868MITCommand line utilitiesCompression ouch_bindings_pythonPython bindings for the OUCH protocol1,582non-standard ouch_connect_coreCore Structures and Traits for OUCH Connectors2,264non-standard ouch_connect_nonblockingNon blocking OUCH protocol implementation1,921non-standard ouch_modelData model bindings for ouch exchange protocol2,625non-standard oughtCLI for the ought behavioral test framework91MIT OR Apache-2.0Development tools::Testing ought-agentProvider-agnostic agent loop driving an Llm against a ToolSet233MIT OR Apache-2.0Development tools::Testing ought-analysisLLM-powered analysis: survey, audit, blame, bisect189MIT OR Apache-2.0Development tools::Testing ought-coreShared cross-cutting types for the ought workspace58MIT OR Apache-2.0Development tools::Testing ought-genLLM-powered test generation for ought specs360MIT OR Apache-2.0Development tools::Testing ought-llmProvider-agnostic LLM client trait + adapters used by ought264MIT OR Apache-2.0Development tools::Testing ought-mcpMCP server for ought143MIT OR Apache-2.0Development tools::Testing ought-reportTerminal, JSON, and JUnit reporting for ought140MIT OR Apache-2.0Development tools::Testing ought-runTest runner and result collection for ought320MIT OR Apache-2.0Development tools::Testing ought-serverWeb viewer and HTTP server for ought specs138MIT OR Apache-2.0Development tools::Testing ought-specParser and clause IR for the .ought.md spec format412MIT OR Apache-2.0Development tools::Testing ougiインタラクティブエンターテインメントを作成する個人プロジェクト883MIT OR Apache-2.0 ouiLookup MAC OUI vendor information from the Wireshark manufacturer database79,377MIT OR Apache-2.0 oui-dataLibrary for looking up information from the IEEE OUI database.22,886MIT ouijaCross-machine AI session daemon — bridges Claude Code sessions via tmux injection and Nostr P2P3,689MITCommand line utilitiesDevelopment tools ouou_dictationA command-line app for self-guided dictation practice in Chinese, Japanese, or English.2,324MIT OR Apache-2.0Command line utilities ourErgonomic, highly generic wrapper for shared mutable data6,829UnlicenseConcurrencyData structures our-dataRust wrapper of data.or.kr1,603MIT our-stringCustomizable shared strings with inlining5,398MIT OR Apache-2.0 our_economy_engineEngine for the game Our Economy. Currently unusable, and progressing through rapid prototyping. Will often be half made, and be…2,734MIT OR Apache-2.0Game enginesSimulation ouraThe tail of Cardano44,501Apache-2.0 oura-apiA client for the Oura V2 REST API4,670MIT oura-cliUnofficial CLI for Oura Ring — sleep, readiness, and activity scores from your terminal.74MITCommand line utilities oura-toolkit-apiGenerated Rust client for the Oura Ring API v2 (progenitor). Do not hand-edit.88MIT oura-toolkit-authNon-interactive auth companion for the Oura Ring API: token store, confidential-client refresh with rotation, and…90MIT oura-toolkit-cliCLI and STDIO MCP server for the Oura Ring API v2 (auth setup/login, data commands, mcp).68MIT ourairportsRust interface for handling OurAirports data1,646MIT OR Apache-2.0Aerospace ouroA golden test runner for language hackers44MITDevelopment tools::Testing ouroborosEasy, safe self-referential struct generation.74,159,495MIT OR Apache-2.0 ouroboros_examplesExamples for the ouroboros crate.59,398MIT OR Apache-2.0 ouroboros_macroProc macro for ouroboros crate.73,775,946MIT OR Apache-2.0 ouroboxOuroboros Box1,580Apache-2.0 ourobufA no_std circular buffer with constant-time operations861MITEmbedded development ourosCommon functionality for 2D games in Rust. Ported from Munificient's Piecemeal project.89MIT ourshModern, fast POSIX compatible shell5,800MITCommand line utilitiesParser implementations ousiaPostgres ORM with native double-entry ledger, graph relations, and atomic money operations for Rust368MITData structuresDatabase interfaces ousia-ledgerA high-performance double-entry ledger system for Rust451MITDatabase interfacesFinance ousia_deriveDerive macros for the ousia library401MIT outProvides fast min and max functionality for collections.73,232MIT OR Apache-2.0AlgorithmsNo standard library out-referenceout references4,481MIT out123-sysThe package provides bindings to out123.25,091Apache-2.0/MITExternal FFI bindingsMultimedia::Audio outagefsFUSE filesystem and tools to emulate and test behaviors on power outage.1,635MITFilesystem outbox-coreCore traits and logic for modular transactional outbox pattern in Rust464MITAsynchronousDatabase interfaces outbox-kafkaKafka transport implementation for the oxide-outbox65MITAsynchronousDatabase interfaces outbox-pattern-processorLibrary to make easier to dispatch your outbox-pattern data from database to SQS, SNS and/or HTTP(S) gateways14,541MITWeb programming outbox-postgresPostgreSQL storage implementation for oxide-outbox using sqlx207MITDatabase interfaces outbox-redisRedis-based idempotency provider for the oxide-outbox98MITAsynchronousData structures outbox-relayRelay events from an outbox table to kafka1,611MIT OR Apache-2.0 outcomeA Success/Failure type for rust13,151MIT outcome-46f94afc-026f-5511-9d7e-7d1fd495fb5cAugmentations for error propagation7,289MITNo standard libraryRust patterns outdattyCatch outdated artifacts via a declared dependency graph and content hashes82MITCommand line utilitiesDevelopment tools outdir-tempdirA crate for cargo-test to create temporary directories under Cargo-provided or caller-selected roots.30,700MITDevelopment tools::Testing outer_attributeA library providiving `OuterAttribute` that implements `syn::parse::Parse` trait.3,591MIT OR Apache-2.0Development tools::Procedural macro helpers outer_cgiA barebones CGI/FCGI wrapper.10,713Zlib outerspaceMethods for prefixing and suffixing the non-whitespace characters in a string.3,978Apache-2.0 outfallExperimental low-level HTTP Library for Rust986MITWeb programming::HTTP server outfitOrbit determination toolkit in Rust. Provides astrometric parsing, observer management, and initial orbit determination (Gauss…1,091non-standardData structuresParsing tools outfluxInfluxDB 2.0 client library that supports writes only1,867non-standardAPI bindings outflyA breathtaking 3D space game in the rings of Jupiter1,537GPL-3.0-onlyAerospaceGames outfoxExperimental AI API client library for Rust.442MIT OR Apache-2.0API bindingsAsynchronous outfox-cli⚠️ DEMO ONLY - Simple chat CLI demo. Do not use in production.23MIT OR Apache-2.0Command line utilities outfox-doubaoDoubao (ByteDance Volcengine) API client for outfox105MIT OR Apache-2.0API bindingsAsynchronous outfox-openaiOpenai for outfox2,568MIT OR Apache-2.0API bindingsAsynchronous outfox-openai-macrosoutfox openai proc macros2,690MIT OR Apache-2.0API bindingsAsynchronous outfox-zhipuZhipu AI (GLM) API client for outfox192MIT OR Apache-2.0API bindingsAsynchronous outgaugeLiveForSpeed Outgauge implementation that focuses on ergonomics and strong typing727MIT outilsGraph and tree data structure library. Providing utilities which aren't easily available in Rust.9,933MIT/Apache-2.0Data structures outis-captcha-coreRTEN/ONNX Runtime based captcha recognition engine126MIT outis-coreRTEN/ONNX Runtime based captcha recognition engine123MIT outlawA simple library that makes dealing with Rust file system a breeze1,587MIT OR Apache-2.0 outlayerSDK for OutLayer off-chain WASM execution on NEAR5,540MIT OR Apache-2.0API bindingsWebAssembly outlayer-cliCLI for deploying, running, and managing OutLayer agents37MIT OR Apache-2.0Command line utilities outletHTTP request/response logging middleware for Axum with streaming support9,650MITWeb programming outlet-postgresPostgreSQL logging handler for outlet HTTP request/response middleware9,965MITDatabase interfacesWeb programming outliersIdentify outliers in a data set.11,132GPL-3.0-only outliers_tableOutliers table, prices with outliers. Contains .dll7,007MIT outline"Good enough" literate programming tool9,626MIT outline-coreImage background removal with flexible mask processing options159MIT outline-mcpTree-structured session guide & checklist as an MCP server290MIT OR Apache-2.0Command line utilities outline-mcp-coreDomain, application, and infrastructure logic for outline-mcp (pure SDK crate, no MCP transport dependency)288MIT OR Apache-2.0Command line utilities outline-mcp-rmcprmcp (MCP) interface layer for outline-mcp: ServerHandler, tool_router, and stdio transport wiring over outline-mcp-core220MIT OR Apache-2.0Command line utilities outline-mcp-rsMCP server for Outline knowledge base integration1,099MITAPI bindingsCommand line utilities outline_2d2D euclide polygon outline tools1,713MIT outline_apiImplementation of Outline VPN server API control12,082MITAPI bindings outline_vpn_apiAPI to manage an Outline server. See…3,853WTFPL outlines-coreStructured Generation32,735Apache-2.0 outlines-core-rsStructured Generation971non-standard outlitOutlit customer context tracking SDK for Rust2,574MITAPI bindingsDevelopment tools outlogA simple logging system based on the log crate.1,834MPL-2.0 outlook-autoOutlook automation through windows COM3,801Apache-2.0 outlook-exeConvenience wrappers for command-line invocation of Outlook.3,336Unlicense OR MITCommand line utilitiesEmail outlook-mapiRust bindings for the Outlook MAPI interface45,726MITOperating systems::Windows APIs outlook-mapi-macrosPrivate macros used by the outlook-mapi crate internally4,457MITOperating systems::Windows APIs outlook-mapi-stubMacros which generate delay load helpers for olmapi32.dll7,254MITOperating systems::Windows APIs outlook-mapi-sysBindings generated with the windows crate for the Outlook MAPI interface25,289MITOperating systems::Windows APIs outlook-pstOutlook PST Store Provider in Rust84,670MITOperating systems::Windows APIs outmoveA VM, compiler and bytecode definition built on top of Move.1,627Apache-2.0 outmove-commonCommon types for outmove.1,669Apache-2.0 outoforderfsRandomized write delays for filesystem tests. Mount your filesystem though the outoforderfs, then interrupt the latter with…4,214MIT outorgaThe generic progressive-authority promotion FSM: shadow → confirm → effect, with a fleet freeze. A k8s-free lift of breathe's…50MIT outpollA command line tool to poll a command and notify you when a specific output is reached.2,046MIT OR Apache-2.0 outpostA command-line application for managing outpost9,031AGPL-3.0-only outpost-coreCore library for Git Outpost, a clone-backed alternative to git worktree workflows.205MIT outpunchReverse WebSocket tunnel proxy — core library142MIT outpunch-axumAxum server adapter for outpunch reverse WebSocket tunnel36MIT outpunch-clientClient library and binary for outpunch reverse WebSocket tunnel37MIT outputSimple CLI output tools23,286MIT output-coloringColoring terminal output, using template.4,030GPL-3.0 output-copyA simple command-line output copy tool1,731MIT output-sanitize-rsStrip dangerous HTML/SQL/shell snippets from LLM output before render, query, or shell sinks. Rust port of…19MIT OR Apache-2.0Text processing output-trackerTrack and assert state of dependencies in state-based tests without mocks803MIT OR Apache-2.0Development tools::DebuggingDevelopment tools::Testing output_iterAn iterator that performs calculation during iteration.888MIT OR Apache-2.0Data structures output_vt100Utility to activate escape codes in Windows' CMD and PowerShell16,599,545MITDevelopment tools outputsA Rust print package for custom console output.7,446MIT outram-foam-appbuilder-libOpenFOAM solver applications, polyMesh I/O, and case file parsing translated to Rust -- an independent OUTRAM PARK fork, not the…12GPL-3.0-onlyScience outram-foam-basic-libOpenFOAM primitive functions translated to Rust -- an independent OUTRAM PARK fork, not the official OpenFOAM software17GPL-3.0-onlyScience outram-foam-turbulence-libOpenFOAM turbulence models translated to Rust (RAS, LES, DES and everything in between) -- an independent OUTRAM PARK fork, not…15GPL-3.0-onlyScience outram-park-fork-coolpropPure-Rust fork/translation of CoolProp (Helmholtz-EOS thermophysical properties), enum-dispatched with hardcoded fluid data — no…12GPL-3.0-onlyScience outrefOut reference140,048,295MITNo standard libraryRust patterns outrigRun LLM agents with podman-isolated MCP servers (library crate).39Apache-2.0Command line utilitiesDevelopment tools outrig-cliCommand-line tool for running LLM agents with podman-isolated MCP servers.18Apache-2.0Command line utilitiesDevelopment tools outscale_apiOutscale API SDK28,145BSD-3-Clause outscriptGenerate output scripts, parse/encode addresses, and build/sign transactions across multiple cryptocurrency networks (Bitcoin,…108MITCryptography::Cryptocurrencies outsideA multi-purpose weather client for your terminal4,350AGPL-3.0-or-laterCommand line utilities outsiderTest artifact changes locally from multiple projects that already use gitlab-art1,427MIT OR Apache-2.0Development tools outsimLiveForSpeed Outsim implementation that focuses on ergonomics and strong typing1,111MIT outsource-heapShoving your heap in random places3,913AGPL-3.0-only outstandingStyled CLI template rendering with automatic terminal detection1,004MITCommand-line interfaceTemplate engine outstanding-bbparserBBCode-style tag parser for terminal styling380MITCommand-line interfaceParser implementations outstanding-clapClap integration for Outstanding template engine - topics and styled help591MITCommand-line interface outstanding-macrosProc macros for compile-time resource embedding in Outstanding508MITDevelopment tools::Procedural macro helpers