BROWSE A-Z
All 305,250 crates, alphabetically
Data as of 2026-07-25 (crates.io database dump, timestamp 2026-07-25T02:00:36Z). Source: crates.io · db-dump.tar.gz · methodology & corrections.
mapped_vecA crate for a vector that not only stores it's data but also it's order.2,897MIT
mappedbptreeMemory maped (mmap) B+ tree implementation in Rust.78MIT
mappedheapAn extensible memory mapped file that keeps track of used and free pages with a simple freelist allocator.3,756MIT
mappedpagesA fixed-size page provider backed by memory mapping, intended for building higher-level allocators and storage systems34MIT
mappedvartrieA Rust library for memory-mapped variable-length key tries, optimized for fast lookups and efficient storage.18MIT
mapperMapping macro to help to reduce mapping boilerplate15,424MIT OR Apache-2.0
mapper-apiApi of the `mapper` crate4,743MIT OR Apache-2.0
mapper-implImplementation detail of the `mapper` crate8,973MIT OR Apache-2.0
mappersPure Rust geographical projections library27,745Apache-2.0
mappers_warpVery simplistic tool for reprojecting maps, based on GdalWarp975Apache-2.0
mapping-algorithmsA collection of pure-rust algorithms, for spatial and SLAM purposes2,394MIT
mapping-suitesA collection of SLAM suites, based on mapping-algorithms2,051MIT
mapping_infoCompact mapping/run metrics container and reporting utilities for sequencing read mapping pipelines.469MIT
mappingsGet the mappings of a process (currently only on Linux)10,109,005Apache-2.0
mapplotA library for plotting data on maps.1,651MIT OR Apache-2.0
mapprA lightweight Rust codebase mapper with an interactive TUI and structured CLI reports18MIT
mapprojImplementation of (a part of) map projections defined in the FITS World Coordinate System (WCS)65,467Apache-2.0 OR MIT
mappum-librocksdb-sysNative bindings to librocksdb3,182MIT/Apache-2.0/BSD-3-Clause
mappum-rocksdbRust wrapper for Facebook's RocksDB embeddable database1,961Apache-2.0
mappyA parser for Quake .map files and their descendent formats26MIT OR Apache-2.0
mappy-clientClient library for mappy maplet data structures990MIT
mappy-coreCore maplet data structure implementation1,225MIT
mapquestA wrapper for the Mapquest REST api2,229Apache-2.0
maprCross-platform Rust API for memory-mapped file IO1,458,735MIT/Apache-2.0
mapradarTurn addresses into coordinates and find nearby amenities using Google Maps API164MIT
maprcRc and Arc alternatives that allow the smart pointer to refer to just a portion of a reference-counted allocation.5,518non-standard
mapreducemapreduce framework1,894MIT
mapreduce-rsA web framework for Rust1,534MIT
maproA tiny macro library for creating std::collections11,273MIT
maproomSemantic code search powered by embeddings, with SQLite or PostgreSQL/pgvector storage246MIT
mapsInspect, compare and align multiple grid maps in an intuitive & fast GUI14,930Apache-2.0
maps-address-completion-serviceServe city names, zip codes, street names and house numbers for auto completion2,753MIT
maps_io_rosFundamental IO for 2D ROS grid maps.1,377Apache-2.0
maps_renderingImage rendering and texture management tailored to the maps crate758Apache-2.0
mapsco-clientAn API client for geocode.maps.co6,561MIT
mapsdFind & Replace text in multiple files using an explicit CSV of Before/After pairs.1,172MIT OR Apache-2.0
mapsforge-rsA Rust parser for Mapsforge binary map files981MIT
mapsticTooling to generate Elasticsearch index mappings from type definitions868MIT OR Apache-2.0
mapstic-coreInternal functionality used by the mapstic crate at runtime1,523MIT OR Apache-2.0
mapstic-deriveDerive macro exported by the mapstic crate1,106MIT OR Apache-2.0
mapstic-derive-implImplementation of the derive macro provided by the mapstic crate1,302MIT OR Apache-2.0
mapstructCreate refactor safe derivatives of Structs with proc-macros.25,528MIT
mapstruct-deriveA derive macro for the mapstruct crate25,903MIT
mapstruct-derive-libA derive macro for mapstruct26,266MIT
mapstruct4rust-deriveA library for mapping two structs1,399Apache-2.0
maptiler-cloudA simple Rust wrapper library around the Maptiler Cloud API7,234MIT
mapuche-embeddedAn implementation of a Redis protocol embedded db, with RocksDB as KV storage.1,544MIT OR Apache-2.0
mapvasA map viewer with drawing functionality28,512MIT OR Apache-2.0
mapwordsHashMap based keyword extraction7,457WTFPL
mapxHigh performance memory map with disk synchronization58MIT
maqueenA Rust library for the DFRobot micro:Maqueen373non-standard
maquiolibrary for building composable distributed systems4,713MIT
marLibrary for reading and writing Mozilla Archive files6,147MPL-2.0
maraA high-performance scraper that clears challenges over a rotating pool of egress IPs.35MIT
maramA modern, high-performance alternative to the Unix tree command1,325MIT
marathonProject planner tool1,847MIT
marathonctlCommand-line control interface for Marathon multiplayer game engine38MIT
maratona-sync-photosTool to sync and convert photos and songs from a source folder to other two311MIT
marauderA utility library for hacking/reading memory of processes/games.1,604MIT
marauder-macrosA macro for generating DLLs for memory hacking2,090MIT
maraudersA tool for hand-crafted mutation analysis and management8,233MIT
marayJIT Ray Tracing using basic math8,349MIT OR Apache-2.0
marblegarbage-collecting on-disk object store39,284MIT/Apache-2.0
marbles-rsMarble generator for World ID.1,208MIT
marbling-bitcoincryptocurrency wallet library supports bitcoin distributed key generation and signing1,642AGPL-3.0
marbu-customization-moduleKomple Framework module for marketplace customization in Marbu.2,704Apache-2.0
marcReader and builder for MARC 21 Bibliographic format45,510MIT/Apache-2.0
marc-recordA MARC21 parser supporting MARC-8 text encoding2,079MIT
marc-relatorsParsing and de/serialization for MARC relators2,490CC0-1.0
marc-rsRust library for MARC21, UNIMARC, and MARC XML format support3,339MIT OR Apache-2.0
marc-rs-deriveDerive macros for marc-rs2,994MIT OR Apache-2.0
marc21A toolkit for processing MARC-21 records.1,175EUPL-1.2
marc21-cliA command-line tool for processing MARC-21 records.94EUPL-1.2
marcelDynamic theme library for the iced GUI framework2,840MIT OR MPL-2.0
marcelomarcelo1,660MIT OR Apache-2.0
MarcFly_LearningRustCreate to publish for chapter 14, tutorial done! Notes ordered by chapter, made to help myself catch back to issues I will keep…11,527MIT
marchA Markov chain implementation1,568MIT
marching-bufferMarching buffer with resets1,704CC0-1.0
marching-cubesA marching cubes implementation in Rust5,912MIT
marching-squaresParallelized marching squares algorithm for constructing closed isolines / contour lines4,237MIT
marching_squares_wgpuParallel Marching Squares algorithm implemented with wgpu1,632non-standard
marchiveMaildir archiving tool. Placeholder.1,908GPL-3.0-only
marcliConverts CommonMark Markdown to ANSI-escaped terminal output148MIT
marcoMarco is a CLI tool to send messages to friends across the network1,987MIT
marco-cargo-test-gitlabtest for release-plz6,050MIT
marco-corenom-based Markdown parser, HTML renderer, and intelligence features (highlights, diagnostics, completions) for the Marco editor.159MIT
marco-crate-exampletest for release-plz17,799MIT OR Apache-2.0
marco-gitea-testTest for release-plz6,471MIT OR Apache-2.0
marco-poloA CLI tool to cartograph codebases and generate Mermaid.js diagrams.53MIT
marco-test-cratesimple test crate2,839MIT
marco-test-onemarco-test-one64,453MIT OR Apache-2.0
marco-test-threemarco-test-three22,534MIT OR Apache-2.0
marco-test-twojust a test for release-plz72,810MIT OR Apache-2.0
marco_paspuel_add_oneTest cargo workpaces publish add one3,924MIT
marco_paspuel_adderTest cargo workpaces publish adder2,706MIT
marco_paspuel_artA library for modeling artistic concepts.1,623MIT
marcosDerive macro for parsing derive macro attributes flexibly and easily77MIT OR Apache-2.0
marcos_coreDerive macro for parsing derive macro attributes flexibly and easily140MIT OR Apache-2.0
marcos_deriveDerive macro for parsing derive macro attributes flexibly and easily135MIT OR Apache-2.0
marctermmy terminal as you might have guessed by the name192MIT
marctkMARC21 Binary, Breaker, and XML Toolkit8,829Apache-2.0
marcusAn experimental Markdown parser written in Rust4,693MIT
marek_google_speech_recognitionIdiomatic bindings for Google Chrome's libsoda6,572AGPL-3.0-or-later
marek_speech_recognition_apiSpeech recognition API6,503AGPL-3.0-or-later
marek_translate_apiNatural language translation API2,212AGPL-3.0-or-later
marek_translate_locallyBindings for translateLocally2,857AGPL-3.0-or-later
marek_vosk_speech_recognitionMarek's bindings for Vosk Speech Recognition2,885AGPL-3.0-or-later
marfyYAML parser that preserves comments22MIT
marfy_deriveDerive macros for marfy69MIT
margMeta config for apps from args7,156MIT
marg-coreMarg core types, configuration loader, and error definitions117Elastic-2.0
marg-orientationA MARG (Magnetic, Angular Rate, and Gravity) orientation estimator2,799EUPL-1.2
marg-providersMarg provider adapter trait and per-provider client implementations98Elastic-2.0
marg-serverMarg HTTP server: request pipeline, routes, graceful shutdown88Elastic-2.0
marg-storageMarg storage trait and backend implementations (SQLite default, Postgres recommended, Redis hot store)100Elastic-2.0
margaReserved name for now1,492MIT OR Apache-2.0
margaret-is-a-catA collection of crates for working with cats2,4930BSD
margemarge create MRs and automatically assigns one of your merge buddies1,875MIT
marginStructured diagnostics core and layout planning865MIT OR Apache-2.0
margin-account-oracleA cargo-generate template for Rust + Sway integration testing.20Apache-2.0
margin-termTerminal rendering for margin layout plans852MIT OR Apache-2.0
marginaliaTrivia-preserving parsing and formatting for logos + lalrpop755MIT
margined-neutron-stdStandard library for Neutron with CosmWasm support included16,692MIT OR Apache-2.0
marginfi-cpimarginfi CPI interface5,447non-standard
marginfi-testMarginfi test1,545Apache-2.0
marginfiv2cpiAutogenerated CPI client for the MarginFi V2 Program3,080Apache-2.0
margoA placeholder registry1,547MIT OR Apache-2.0
margo-fetchModular reimplementation of (parts of) Cargo1,928MIT OR Apache-2.0
mariaa simple expressjs like web framework builtin rust6,762MIT
maria-linalgA simple linear algebra processing package.18,012MIT
mariadb-mysql-kbsAn index of the MariaDB and MySQL Knowledge bases10,901MPL-2.0
mariadb_exporterMariaDB metric exporter for Prometheus376BSD-3-Clause
maridAn orchestration library for running, waiting on, and stopping threads.7,038BSD-3-Clause
marie-ssgA fast static site generator that converts markdown with TOML metadata into HTML29MIT
marigoldThe Marigold Programming Language.17,418Apache-2.0 OR MIT
marigold-grammarGrammar for the marigold language.21,935Apache-2.0 OR MIT
marigold-implInternal logic for the marigold language.20,556Apache-2.0 OR MIT
marigold-macrosMacros for the marigold language.21,719Apache-2.0 OR MIT
marikoComing soon...1,255MIT OR Apache-2.0
marinRust implementation of the DSL used for kantek (kv2.dev)1,659GPL-3.0-only
marinaA dataset manager for robotics to organize, share, and discover datasets and metadata across storage backends.783MIT OR Apache-2.0
marina-tuiA developer-process cockpit — the dev servers and processes you care about, resolved into names you recognize18Apache-2.0
marinadeMarinade stake pool Anchor client.5,401AGPL-3.0
marinade-cpiAutogenerated CPI client for the Marinade liquid staking program.9,549Apache-2.0
marinaraa cli-based pomodoro timer4,918Apache-2.0/MIT
marineFluence Marine command line tool74,798Apache-2.0
marine-build-rs-generatorTools for generating marine_test_env in build scripts64,921Apache-2.0
marine-call-parametersContains CallParameters and SecurityTetralets structures for marine-rs-sdk108,421Apache-2.0
marine-coreCore of Marine, the Fluence Wasm Runtime101,357Apache-2.0
marine-it-generatorFluence Marine interface types generator126,435Apache-2.0
marine-it-interfacesFluence Marine interface types helper crate110,778Apache-2.0
marine-it-parserFluence Marine interface types parser139,687Apache-2.0
marine-js-backendFluence Marine Wasm backend interface implementation for JS environment7,933Apache-2.0
marine-macroDefinition of the `#[marine]` macro188,468Apache-2.0
marine-macro-implImplementation of the `#[marine]` macro213,243Apache-2.0
marine-macro-testing-utilsSome functions for testing procedural macros16,346Apache-2.0
marine-min-it-versionFluence Marine interface types minimum supported version checker75,437Apache-2.0
marine-module-info-parserFluence Marine Wasm module info (manifest and version) parser117,742Apache-2.0
marine-module-interfaceFluence Marine module interface114,897Apache-2.0
marine-rs-sdkFluence backend SDK for developing backend applications for the Fluence network130,826Apache-2.0
marine-rs-sdk-mainContains logger, allocators and several other modules for marine-rs-sdk178,680Apache-2.0
marine-rs-sdk-testBackend SDK that allows testing modules for the Marine runtime71,946Apache-2.0
marine-runtimeThe Fluence Wasm Runtime147,191Apache-2.0
marine-sqlite-connectorThe package provides an interface to SQLite.53,044Apache-2.0/MIT
marine-test-macroDefinition of the `#[marine_test]` macro79,127Apache-2.0
marine-test-macro-implImplementation of the `#[marine_test]` macro79,237Apache-2.0
marine-timestamp-macroDefinition of the `#[build_timestamp]` macro142,819Apache-2.0
marine-utilsFluence Marine utils crate82,130Apache-2.0
marine-wasm-backend-traitsFluence Marine generic Wasm backend interface78,809Apache-2.0
marine-wasmtime-backendFluence Marine Wasm backend interface implementation for Wasmtime63,771Apache-2.0
marine_vessel_simulatorA simulator for marine vessels and their performance in various conditions.689GPL-3.0-or-later
marinefetcha tool to fetch your computer1,510MIT
mario_minigrepfirst project for minigrep1,923MIT OR Apache-2.0
marionetteLibrary implementing the client side of Gecko's Marionette remote automation protocol.110,298MPL-2.0
mariposaA chess engine.1,200MIT
marisa-ffiRust FFI bindings for libmarisa - a space-efficient trie data structure642BSD-2-Clause
marisa-rsSafe Rust wrapper for the marisa-trie C++ library1,405LGPL-2.1-or-later
mariusMarius: a data-oriented reactive projection engine. PostgreSQL → AOT HTML, zero intermediate transformation.56MIT OR Apache-2.0
marius-bridge-forgeBuild-time SQLx batch query and Axum route generator for the Marius engine.44MIT OR Apache-2.0
marius-collectorLock-free bit-vector collector for the Marius reactive engine. Pure Core, no async runtime.167MIT OR Apache-2.0
marius-db-forgeBuild-time generator: PostgreSQL pg_attribute → Rust #[repr(C)] structs for the Marius engine.111MIT OR Apache-2.0
marius-fragment-forgeBuild-time HTML render generator for the Marius engine. Computes static/dynamic buffer capacities.148MIT OR Apache-2.0
marius-guard-forgeBuild-time RLS and security trait generator for the Marius engine.34MIT OR Apache-2.0
marius-projectionProjection trait for the Marius reactive engine (Core/Shell boundary).162MIT OR Apache-2.0
marius-renderDispatcher and artifact rendering shell for the Marius reactive engine.95MIT OR Apache-2.0
marius-schemaGenerated #[repr(C)] structs and Collector statics mirroring PostgreSQL schema for the Marius engine.78MIT OR Apache-2.0
marjapussiImplements the Finnish card game Marjapussi.2,580GPL-3.0
markHTML generator for Markdown3,133
mark-api-downAPI workspace — design specs, send requests, validate contracts, from CLI and browser.20Apache-2.0
mark-clipboardA simple clipboard manager for the command line3,400MIT
mark-flaky-testsMark, debug and auto-retry your flaky tests106,316MIT OR Apache-2.0
mark-flaky-tests-macroMark, debug and auto-retry your flaky tests (proc-macro crate)106,792MIT OR Apache-2.0
mark-htmlA simple and efficient Markdown to HTML parser written in Rust.719MIT
mark-rsA Markdown parser and Static Site Generator2,898MIT
mark-testtest create crate1,992MIT
mark-treequestionable tree-shaped thing240MIT
mark_lastSimple extension to rust iterator's to mark the last element of an iterator5,392MIT
mark_recallA bookmark system for the shell1,649MIT
mark_tuple_traitsa proc_macro for marking tuples of length up to 32 with a single marker trait to bypass the 'fundamental' feature3,130MIT
markab_parserA simple, copy-less and rich-error-message parser combinator library.11,013MIT/Apache-2.0