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.
reinhardt-utilsUtility functions aggregator for Reinhardt12,336BSD-3-Clause
reinhardt-viewsView layer aggregator for viewsets and views-core10,953BSD-3-Clause
reinhardt-webA full-stack API framework for Rust, inspired by Django and Django REST Framework8,625BSD-3-Clause
reinhardt-websocketsWebSocket support for real-time bidirectional communication8,847BSD-3-Clause
reinholdA simple diceware password generator.3,082MIT
reinsLLM task journal + shared inbox manager16MIT
reinstallThis is a dummy package that will never have any content. I registered it because it seemed plausible that people might…1,915CC0-1.0
reinterpretLow level utility functions to reinterpret arrays of data427,786MIT OR Apache-2.0
reinyreiny SDK: publish/subscribe by Rust type via Cloudy and the #[reiny::main] runtime79MIT
reiny-buildreiny build helper: reads Reiny.toml, compiles protos, and generates types and topics91MIT
reiny-clireiny CLI: scaffold grains (new/init/add), build, run, and compress via the `reiny` command37MIT
reiny-launchreiny launcher: spawn grain processes from a launch config's [grain] section50MIT
reiny-macrosThe #[reiny::main] proc-macro for reiny (use via the reiny crate, not directly)94MIT
reisPure Rust implementation of libei/libeis protocol.94,963MIT
reishiToy programming language written in rust.1,621MIT
reishi-handshakePure, sans-IO Noise IK, confirmed pqIK, and hybrid IK handshakes1,229MIT
reishi-quinnNoise IK handshake integration for quinn with QUIC key derivation1,139MIT
reiterateIterator adaptor with caching that allows reiterating over the same iterator through the cache27,734MIT/Apache-2.0
reiteratorLazy repeatable caching iterator that only ever calculates each element once.8,460MPL-2.0
reivilibre_fork_cylon(FORK) An efficient compiler for robots.txt files1,686MIT
reizuProvides a namespace for reizu crates2,949MIT OR Apache-2.0
rejMinimalistic database10,555MIT
rejoiceA simple and delightful little web framework for Rust735MIT
rejoin_sliceThis crate provides functions to join two slices that are adjacent in memory.4,814MIT
rejsonA command line utility for managing secrets12,768MIT
rekSynchronous HTTP client1,648MIT
rek0n-chunkShared semantic chunk types for the rek0n parser and embed pipeline35MIT
rek0n-probeCross-platform GPU memory probe for rek0n backend selection14MIT
rek2_httpserverHTTP server that accepts POST data to exfiltrate files from remote servers to local computer during hacking and penetration…510GPL-3.0
rek2_nntpThis is a Rust library that provides a way to interact with NNTP servers, compliant with RFC 3977 and RFC 4643.12,094GPL-3.0-or-later
rekaAsync Rust SDK for the Reka API.20MIT
rekarpc98_publish_crateA crate for publishing crates to crates.io1,217MIT
rekenrekA Peer-to-Peer counting and voting library1,616Apache-2.0
reki3A modern bittorrent tracker, using a Redis database4,131BSD-3-Clause
rekkerAttack library written for rust and python14,004MIT
rekorDO NOT USE: rekor placeholder1,291MIT
rekord-ripperRekordbox analysis utilities37MIT OR Apache-2.0
rekordbox-pdbRead and write the rekordbox export.pdb / exportExt.pdb databases from PIONEER USB exports21MIT
rekordcrateLibrary for parsing Pioneer Rekordbox device exports9,450MPL-2.0
rekryptProfessional proxy re-encryption library based on Curve25519 for Rust and WebAssembly69AGPL-3.0-or-later
reksonA simple standalone to rectify json1,767MIT
rektWIP. A framework for real-time online games.1,774MIT
rekt-commonCommon lib to use the rekt-protocol. See the crate homepage to check the protocol RFC.1,494MIT
rekt-protocol-commonCommon lib to use the rekt-protocol. See the crate homepage to check the protocol RFC.2,689MIT
rekt_libCommon lib to use the RekT protocol. See the crate homepage to check the protocol RFC.9,798MIT
rekurRekur19MIT
rekvAn experimanntal redis like Key-Value-Store client and server.122MIT
relRelations20,738MIT OR Apache-2.0
rel-ptrA tool for building movable self-referential types14,334MIT
rel_allocPlaceholder for rel_alloc1,603MIT OR Apache-2.0
rel_alloc_derivePlaceholder for rel_alloc_derive1,577MIT OR Apache-2.0
rel_corePlaceholder for rel_core1,599MIT OR Apache-2.0
rel_core_derivePlaceholder for rel_core_derive1,570MIT OR Apache-2.0
rel_stdPlaceholder for rel_std1,637MIT OR Apache-2.0
relabufRelease valve buffer release items either after time or number thresholds are reached18,648MIT
relais-adapter-githubGitHub adapter for the relais API gateway.61MIT OR Apache-2.0
relais-adapter-hackernewsHacker News adapter for the relais API gateway.74MIT OR Apache-2.0
relais-adapter-scsSCS (kratos rewrite) adapter for the relais API gateway.62MIT OR Apache-2.0
relais-adapter-scs-legacyLegacy SCS (Beego) adapter for the relais API gateway — generated, data-driven over the full /1 action API.61MIT OR Apache-2.0
relais-cliCommand-line interface for the relais API gateway (installs the `relais` binary).45MIT OR Apache-2.0
relais-coreCore traits, types, and credential vault for the relais API gateway.138MIT OR Apache-2.0
relais-llm-fallbackLLM/browser-driven fallback adapter for the relais API gateway.66MIT OR Apache-2.0
relais-serverHTTP server (axum) exposing the relais API gateway over /v1/exec.63MIT OR Apache-2.0
relasticSimple rust lib inspired by Serilog for application-wide logging to Elastic22,925MIT
relateCLI for working with .cypher and .gram files and Neo4j21MIT
relateby-gramBidirectional codec between Gram notation and Pattern data structures428BSD-3-Clause
relateby-patoCLI tooling for gram files198BSD-3-Clause
relateby-patternCore pattern data structures604BSD-3-Clause
related_intervalsRelationship between intervals1,615MIT
relationA simple library based on the mathematical concept of financial relations1,585MIT
relationalplaceholder1,692ISC
relational-algebraPlaceholder for Relational Algebra model and tools.1,581non-standard
relational_engineSQL-like relational engine with SIMD-accelerated filtering and columnar storage313MIT OR Apache-2.0
relational_typesManage relations between objects52,549MIT
relational_types_procmacroProcmacro to help create relations between objects52,123MIT
relationsA lightweight library for working with mathematical binary relations.4,021Apache-2.0
relativeA type to wrap vtable references such that they can be safely sent between other processes running the same binary.67,687MIT OR Apache-2.0
relative-date-timeA simple command prints relative time.1,513MIT
relative-durationDuration with negative capabilities5,004MIT
relative-luminanceUtlities to manage relative luminance6,266MIT OR Apache-2.0
relative-pathPortable, relative paths for Rust.91,622,269MIT OR Apache-2.0
relative-path-utilsPortable, relative paths for Rust.8,404MIT OR Apache-2.0
relativedeltaComplex date arithmetic: add/subtract months and years without errors, target weekdays, lock dates. Better than Duration for…9,462MPL-2.0+
relativelylightWeb-app building blocks: auto-generated CRUD JSON API from your ORM entities, an auto-generated Alpine.js CRUD UI bound to that…26MIT
relativetime🦀 Rust library for printing human readable, relative time differences13,235MIT
relativityPlaceholder for a future project1,775Apache-2.0 WITH LLVM-exception
relaunchRelaunch is a crate for bundling and relaunching macOS applications, in order to access OS features that are only available to…7,950MPL-2.0
relava-typesShared types, validation, and version logic for Relava21Apache-2.0
relaxDerive Partial<T>13,213MIT OR Apache-2.0
relax-macrosDerive macro to implement Relax/Relaxed traits11,614MIT OR Apache-2.0
relax-playerA terminal-based relaxation sound player with ambient sounds like rain, thunder, and campfire245MIT
relaxedWrappers around Atomics that always use `Ordering::Relaxed`2,606MIT OR Apache-2.0
relaxed_channelWrapper around async-channel, more performant on heavy pipelines2,928LGPL-3.0-only
relayA lightweight oneshot Future channel.1,703,621MIT OR Apache-2.0
relay-agentRelay Mail Agent38Apache-2.0
relay-agent-entityEnitity definitions for the Relay Mail Agent108Apache-2.0
relay-agent-migrationMigrations for the Relay Mail Agent109Apache-2.0
relay-agent-sdkRust SDK for devices connecting to gRPC-Relay18MIT
relay-bpA rust implementation of relay belief propagation for qLDPC codes9,032Apache-2.0
relay-ciphersCipher implementations for Relay Mail80Apache-2.0
relay-cliCLI interface for Relay Agents.253Apache-2.0
relay-controller-sdkRust SDK for controllers connecting to gRPC-Relay19MIT
relay-coreThe core components of the Relay Protocol.752Apache-2.0
relay-core-api[Internal] Shared data contracts for relay-core. Use `relay-core-runtime` instead.1,653MIT
relay-core-cliStandalone CLI and TUI for relay-core: local proxy operation, rule management, traffic inspection556MIT
relay-core-httpREST/SSE HTTP API adapter for relay-core: language-agnostic integration boundary for external tools778MIT
relay-core-lib[Internal] Transport and interception engine for relay-core-runtime. Use `relay-core-runtime` instead.1,428MIT
relay-core-probeMCP probe adapter for relay-core: exposes traffic inspection and control to AI agents601MIT
relay-core-runtimeHigh-performance Rust traffic interception engine and proxy platform1,183MIT
relay-core-script[Internal] Deno/V8 scripting engine for relay-core-runtime. Feature backend — enable via `relay-core/script`.1,310MIT
relay-core-storage[Internal] SQLite persistence layer for relay-core-runtime. Not a user-facing crate.1,303MIT
relay-core-tauriTauri plugin for RelayCraft desktop: embeds relay-core proxy engine into Tauri applications526MIT
relay-cryptoThe crypto library for the Relay Ecosystem.666Apache-2.0
relay-gitcode-cliGitCode command line client with gh-style ergonomics.96MIT
relay-hook-transpilerMinimal JSX/TSX transpiler for Relay hooks with dynamic import() rewrite to context.helpers.loadModule and friendly errors116MIT OR Apache-2.0
relay-knowledgeGraph-database-based knowledge graph project.392MIT
relay-libThe Relay library.570Apache-2.0
relay-mailerAn Actix Web server leveraging the lettre crate to relay form field data to email addresses3,218MIT OR Apache-2.0
relay-manPeer to peer library10,668GPL-3.0
relay-monoDriver for a Tessel Relay module.2,310MIT
relay-pezutilsPezkuwiChain SDK component - placeholder for name reservation27Apache-2.0
relay-protoShared protobuf and gRPC bindings for the gRPC-Relay workspace160MIT
relay-runtimeUniversal client hook runtime: parsing, execution, rendering, debugging41MIT OR Apache-2.0
relay-sessionRaptorQ-first relay sessions and bounded carrier interfaces for Wavey media37MIT
relay-sr201SR-201 Network Relay Controller2,954MIT
relay8xcontrol a specific 8x relaise card via serial / USB6,350Apache-2.0 OR MIT
relay_channelA single-producer, single-consumer channel where the sender waits for the receiver to receive the message before returning.108,001MIT
relay_nodeA relay node on a dependent path.1,556MIT
relayburn-cliThe `burn` CLI — published to crates.io. Crate name is relayburn-cli because `burn` is taken on crates.io; the binary keeps the…706MIT
relayburn-sdkEmbedding API for relayburn — published to crates.io as the supported Rust surface.1,014MIT
relaycacheAlways-revalidating HTTP caching proxy with content-addressed SQLite-backed disk cache42MIT
relaycastRust SDK for RelayCast - multi-agent coordination platform36,101Apache-2.0
relaylyRust SDK for Relayly - self-hosted end-to-end encrypted WebSocket relay32MIT
relayneA lightweight transprt-agnostic messaging bus for relaying events across services.40non-standard
relayne-coreFoundational types and traits relayne depends on.172non-standard
relayport-rsFast and easy abstraction for proxying TCPand UDP ports.8,640BSD-2-Clause
relayrCron scheduler with a delegated-flavour syntax3,029MIT OR Apache-2.0
relayr-macrosRelayr macros for the relayr crate3,349MIT OR Apache-2.0
relayrl_algorithmsIndependent / Multi-Agent Proximal Policy Optimization (PPO) Algorithms for the RelayRL framework160Apache-2.0
relayrl_env_traitTraits for training and testing environments in the RelayRL framework.221Apache-2.0
relayrl_frameworkA heterogeneous RL runtime control platform for concurrent multi-actor execution.1,394Apache-2.0
relayrl_typesData types for the RelayRL framework.2,033Apache-2.0
relaysCurated Nostr relay catalog with CI-driven JSON/Markdown generation and health checks16MIT OR Apache-2.0
relayxA TCP client with shell-like interface.470MIT
RelclisEasy lightweight CLI boilerplate.6,242 AGPL-3.0-or-later
relconfManage configuration depending on the current path2,869MIT
relearnA Reinforcement Learning library8,244LGPL-3.0-only
relearn_deriveDerive macros for the relearn package5,585LGPL-3.0-only
releasablejust testing flow7,743MIT
releasaurusA comprehensive release automation tool that streamlines the software release process across multiple programming languages and…3,152MIT OR Apache-2.0
releasaurus-coreA comprehensive release automation tool that streamlines the software release process across multiple programming languages and…520MIT OR Apache-2.0
releaseClean up your release git workflow6,455MIT
release-cutRelease-cut utility for phenotype-tooling16MIT
release-depA Rust library for fetching and downloading release binaries from multiple Git repositories (GitHub and Gitee) with semver…13,877MIT
release-downloaderDownloads releases from GitHub2,048MIT
release-experiment-inner-crateExperimenting with semver on crates.io2,843MIT
release-experiment-top-crateExperimenting with semver on crates.io2,847MIT
release-exporterRetrieves release information and exports related metrics.9,253MIT OR Apache-2.0
release-hubA simple updater for Rust GUI applications305MIT OR Apache-2.0
release-managementThis package is no longer used.5,466MIT
release-managerA utility to manage releasing rust programs7,838GPL-3.0
release-meCreate your release with ease!1,821MIT
release-oxcOxc release management2,370MIT
release-playgroundCLI for release-playground54MIT
release-playground-coreLibrary for release-playground108MIT
release-playground-libLibrary for release-playground26MIT
release-plzUpdate version and changelog based on semantic versioning and conventional commits323,938MIT OR Apache-2.0
release-plz-testA test crate for the release-plz action1,340MIT
release-proofEnd-to-end verifier for OSS GitHub, crates.io, docs.rs, and install releases38MIT OR Apache-2.0
release-rule-verificationtest492Apache-2.0
release-rustJust a test package for a rust github workflow4,333MIT OR Apache-2.0
release-scriptTool for updating your cargo project version1,535MIT
release-test-clientrelease-test-client327non-standard
release-test-interfacerelease-test-interface497non-standard
release-utilsUtilities for automatically releasing Rust code9,990MIT OR Apache-2.0
release2giteesync github releases to gitee releases176MIT OR Apache-2.0
release_democrate demo1,170MIT
release_plz_coreUpdate version and changelog based on semantic versioning and conventional commits229,437MIT OR Apache-2.0
release_profilesA fun game where you guess what number the computer has chosen.1,228MIT OR Apache-2.0
release_tinademo255MIT
releasecheckSimple CLI app for getting a list of latest game releases from OpenCritic6,129MIT
releasedemo发布学习项目41MIT
releasekitClient-agnostic library for fetching releases from git forges147MIT
releaserCrate or workspace releasing tool. All crates from workspace will be released on crates.io62,585MIT
releasesA test crate.167MIT
releasetagDefine releasetags eventually propagating into crash-files 'core'17,396Apache-2.0
releasorA CLI that automates release tasks for Rust 🦀 projects, streamlining builds, .tar.gz packaging, and binary verification for a…949MIT
releasor2000Release your bin everywhere*.22BSD-3-Clause
releasrRelease note tracking on a per environment per semver release.1,522MIT
releasy-clientRust client for the Releasy release management API24Apache-2.0
releezAn utility tool to run application release-checklist safely.7,560MIT
relegramwrapper for telegram bot api20,600MIT
relendA generalized reborrowing mechanism that extends beyond simple references. It also allows for implementing traits that work with…2,808MIT
relentlessComposable retry policies for fallible operations and polling.497MIT OR Apache-2.0
relentless-identityOfficial Rust SDK for the Relentless Identity API. Learn more at https://relentlessidentity.com/docs.37MIT
relevantA small utility type to emulate must-use types354,459MIT/Apache-2.0
relexa library for building a regex-based lexer5,320MIT
relexerA simple lexer powered by custom derive1,938MIT
relexer-deriveA simple lexer powered by custom derive. Macro implementation crate2,870MIT
rELFTiny C like elf parsing library2,283Beerware