All 305,250 crates, alphabetically

jean_alignmentSequence alignment feature for jean2,169GPL-3.0Science jean_blosumBLOSUM feature for jean2,196GPL-3.0Science jean_coreCore package of jean5,008GPL-3.0Science jean_cutCodon usage tables feature for jean2,204GPL-3.0Science jean_ioI/O library feature for jean3,031GPL-3.0Science jean_macrosMacro library feature for jean1,619GPL-3.0Science jeansGenetic algorithms7,054MIT OR Apache-2.0AlgorithmsMathematics jebexperimenting with machine- and human-sympathetic encoding2,664MIT OR Apache-2.0Encoding jeb1pochybridhello44MIT jecMy collection of general-purpose crates6,464MIT/Apache-2.0 jec-rccowAutomatic copy-on-write ref-counted wrapper2,564MIT/Apache-2.0 jecsA simple but functional ECS2,932non-standard jedProduces Json Iterators over instances of io.Read26,092MIT jedecA library for working with JEDEC programming files10,3900BSDParser implementations jedentbd19MIT OR Apache-2.0 jediJedi is the Juggernaut Electronic Data Interchange package. This library provides a data exchange layer extended through the holy…23,707MIT jeditCommand-line tool to view and edit large JSON file2,639MIT jedvekMultidimensional Rust vectors with a 1D footprint177MIT JeebsToolkit for Rapid Application Development2,435MIT jeepCAN event handling for Jeep JL2,844MIT OR Apache-2.0Embedded developmentHardware support jeep-trainAn experimental high level web framework.1,738non-standard jeep-train-macroMacro for jeep train.2,601non-standard jeep-train-preludeprelude for jeep train.3,186non-standard jeepayjeepay-sdk-rs1,537Apache-2.0 jeepersIncomplete Genetic Programming library for Rust.3,577LGPL-3.0 jeeraA TUI App for Jira built using Rust3,703Apache-2.0 jeevesWIP: Automatically move or delete files1,836MIT jeferA simple & minimal cross-platform dotfiles management tool1,858MIT jeffYour note taking pal.4,015MITCommand line utilities jeff-formatRust bindings for the jeff exchange format417Apache-2.0Compilers jeffersonvilleA simple, lightweight, Olson-free timestamp and timezone library1,585MIT OR Apache-2.0Date and time jeflogA lightweight, responsive, task-based logging library10,568MIT jekyllPure Rust implementation of Jekyll static site generator compiler21AGPL-3.0Command line utilitiesCompilers jekyll-to-gatsbyA tool to batch update Jekyll markdown posts to work with Gatsby, adding their date in the frontmatter block5,512MITCommand line utilities jelThis is a placeholder package.1,306MIT jelalA minimal, no-std modern Jalali (Persian/Iranian/Shamsi) calendar for developers with diverse language support (Rust, JS/TS/WASM,…3,059Apache-2.0 OR MITDate and timeNo standard library::No dynamic allocation jelal_procReserved crate for future (and past usage) of proc macros in `jelal`2,127Apache-2.0 OR MITDevelopment tools::FFI jelastic-rsRust wrapper for the Jelastic API1,627non-standardAPI bindingsAsynchronous JellyA tool to interact with a shell via Slipmux66MIT OR Apache-2.0Command line utilities jelly-libA Rust library for the Jelly FPGA real-time computing development platform.89MIT jelly-mem_accessMemory Mapped I/O access library19,321MIT jelly-pacPeripheral Access Crate for the Jelly FPGA real-time computing development platform.67MIT jelly_ecsA simple but functional ECS4,219non-standard jellybeanSyntax highlighting with tree-sitter. Sweet colors.2,730MIT OR Apache-2.0Text processing jellybean-pack-0Sweet syntax highlighting with tree-sitter.2,460MIT OR Apache-2.0Text processing jellybean-pack-1Sweet syntax highlighting with tree-sitter.2,468MIT OR Apache-2.0Text processing jellybean-pack-2Sweet syntax highlighting with tree-sitter.2,346MIT OR Apache-2.0Text processing jellybean-tree-sitterRust bindings to the Tree-sitter parsing library4,391MITAPI bindingsParsing tools jellybean-tree-sitter-highlightLibrary for performing syntax highlighting with Tree-sitter3,934MITParsing toolsText editors jellybeanidleAn idle/incremental game to collect magic energy942MIT jellybeanidle-serverGame server for jellybeanidle947MIT jellycatA CLI tool that bridges Jujutsu (jj) version control with GitHub Pull Requests66MIT jellyfinBindings to the jellyfin web API7,735MITAPI bindings jellyfin-remote-proxyA simple remote proxy that tunnels to a remote Jellyfin server and acts as a Jellyfin server locally.5,767AGPL-3.0 jellyfin-rpcBackend for the Jellyfin-RPC-cli and Jellyfin-RPC-Iced projects24,466GPL-3.0-or-later jellyfin-rpc-cliDisplays the content you're currently watching on Discord!15,483GPL-3.0-or-later jellyfin-sdkAsync Jellyfin API client SDK for Rust (reqwest-based).324MIT OR Apache-2.0API bindingsMultimedia jellyfin-sdk-rustJellyfin Rust SDK7,858MIT jellyfin-tuiA TUI music player for Jellyfin90MIT jellyfin_apiIncomplete Rust client for the Jellyfin API.11,974Unlicense jellyfishApproximate and phonetic matching of strings.9,863MIT jellyfish-merklereserve crate name1,840Apache-2.0 jellyfish-readerPure Rust reader for Jellyfish k-mer counting output files23MITParser implementationsScience jellyflowUser-friendly facade for the headless Jellyflow graph engine.77MIT OR Apache-2.0Data structuresGUI jellyflow-coreHeadless graph model, IDs, type descriptors, and interaction policy primitives for Jellyflow.143MIT OR Apache-2.0Data structuresGUI jellyflow-eguiImmediate-mode egui adapter for Jellyflow node graphs.18MIT OR Apache-2.0GUIVisualization jellyflow-layoutOptional headless graph layout adapters for Jellyflow.121MIT OR Apache-2.0AlgorithmsGUI jellyflow-runtimeHeadless store, rules, schema, profile, and change pipeline for Jellyflow.97MIT OR Apache-2.0Data structuresGUI jellymodelData models for jellybeanidle1,750MIT jellyprotoProtocol for jellybeanidle988MIT jellyschemaConfiguration DSL16,450Apache-2.0ConfigurationEncoding jellytuiA terminal user interface for Jellyfin, using MPV2,499GPL-3.0 jemA simple library that makes dealing with Rust file system a breeze1,771MIT OR Apache-2.0 jemallocbinds to jemalloc18,137MIT OR Apache-2.0 jemalloc-ctlA safe wrapper over jemalloc's control and introspection APIs13,306,395MIT/Apache-2.0API bindingsDevelopment tools jemalloc-infoA small library for exporting jemalloc allocation data in Elixir2,203,573MIT jemalloc-sysRust FFI bindings to jemalloc29,201,930MIT/Apache-2.0 jemalloc_pprofConvert jemalloc heap profiles to pprof to understand memory usage, fix memory leaks, and fix OOM Kills.10,222,759Apache-2.0Development toolsDevelopment tools::Debugging jemallocatorA Rust allocator backed by jemalloc26,575,552MIT/Apache-2.0API bindingsMemory management jemallocator-globalSets `jemalloc` as the `#[global_allocator]`71,463MIT/Apache-2.0API bindingsMemory management jemdoc-rsA Rust rewrite of jemdoc, a light text-based markup language for creating static websites.22Apache-2.0Command line utilitiesTemplate engine jeminiTHIS IS A WIP! (But the simplest functionality there) A, _hopefully_ Rusty wrapper for the Gemini REST API:…3,836MIT jemmyThis package provides a coherent set of manual accessor macros.2,845MIT/Apache-2.0 jenA simple CLI generation tool for creating large datasets.22,904MITCommand-line interfaceCommand line utilities jen_launcherTiny Node.js launcher38MIT jencliA tool to work with Jenkins from the command line.1,964MITCommand line utilitiesDevelopment tools jengaA stack based allocator17,944MIT jenginePersonal roguelike game engine.152GPL-3.0Game engines JenkHashBob Jenkins hash functions for Rust with a digest-compatible API.140non-standardAlgorithmsNo standard library jenkinsA CLI tool for triggering Jenkins builds and monitoring job status14,531MITCommand line utilitiesDevelopment tools::Testing jenkins-rsA Jenkins API client for Rust814non-standardAPI bindings jenkins-sdkJenkins API SDK in pure Rust with async and blocking clients, typed endpoints, pluggable middleware, and zero magic strings.5,728MIT jenkins_apiBindings for the Jenkins JSON API40,585MIT jenkins_hashNative rust implementation of the hash algorithms from Bob Jenkins.2,827CC0-1.0 jenkins_sample_libDummy library for testing automation for pushing to crates.io5,070MIT OR BSD-3-Clause jenkinsctlJenkins management tool10,960GPL-2.0-or-later jenkinsfilea tools to convert Jenkinsfile to data struct6,615LGPL-3.0+ jennerTools for working with generators to work with both iterators and streams9,175MIT jenner-macroMacro implementations for jenner10,110MIT jenqQuery jenkins for jobs matching filters3,440non-standardCommand line utilities jenrjenr1,508MIT jensReadable templates for code generation20,044MIT/Apache-2.0 jens_deriveConvenience macros for code generation with jens3,130MIT/Apache-2.0 jentai-common-loggingA collection of common logging utilities and types for the JenTai project.23MIT jentai-commonsA collection of common utilities and types for the JenTai project.17MIT jentryTiny script for naming journal entries1,655MIT jep106A pollable collection of all JEP106 manufacturer codes.833,394MIT OR Apache-2.0Development tools::DebuggingEmbedded development jepaCLI and TUI for the jepa-rs workspace25MITCommand line utilities jepa-compatCheckpoint and ONNX compatibility utilities for jepa-rs models88MITAlgorithmsScience jepa-coreCore traits and abstractions for JEPA (Joint Embedding Predictive Architecture)328MITAlgorithmsScience jepa-trainTraining loop utilities for JEPA models146MITAlgorithmsScience jepa-visionVision-specific JEPA implementations (ViT encoder, patch embedding, I-JEPA)99MITAlgorithmsScience jepa-worldAction-conditioned world model and hierarchical JEPA (H-JEPA)87MITAlgorithmsScience jerjer1,683MIT jeraShared infra runtime extracted from nornir: the durable job ledger + a no-shell container (bollard/podman REST) and KVM/VM boot…97MIT OR Apache-2.0Database interfacesDevelopment tools jerasure-rsRust bindings to the `jerasure` and `gf-complete` library2,566MITAPI bindings jerasure-sysFFI bindings to the jerasure and gf-complete library3,975MITAPI bindingsExternal FFI bindings jerbComing Soon41MIT jerboaGraphics library under development.1,610Apache-2.0 jerbsCommand-line work-stealing scheduler.2,957GPL-3.0Command line utilities jeriJeri is a modular, secure, privacy-first distributed collaboration core in Rust.815MITData structuresNetwork programming jerichoFuture tiling manager for macOS1,660MIT jerkJava Embedding Rust Kit15,236MIT OR Apache-2.0Development tools::Build UtilsDevelopment tools::Testing jerk-buildMerged into jerk12,156MIT OR Apache-2.0 jerk-testMerged into jerk12,098MIT OR Apache-2.0 jerkySuccinct on-disk data structures in Rust2,524MIT OR Apache-2.0Data structures jeromeDoes ROT13 decoding/encoding1,552MITCommand line utilities jerryShallow multithreaded web server1,995MIT jerrycanThe AI-native Rust backend platform: framework, CLI, and MCP server. https://jerrycan.cc409MITCommand line utilitiesWeb programming::HTTP server jerrycan-authAuthentication extension for the jerrycan framework: argon2 password hashing, encrypted sessions, JWT, role guards.…448MITAuthentication jerrycan-coreCore of the jerrycan framework: routing, extractors, dependency injection, middleware. https://jerrycan.cc863MITWeb programming::HTTP server jerrycan-dbDatabase extension for the jerrycan framework: SQLite + Postgres via sqlx, module-owned migrations, Db dependency.…587MITDatabase interfaces jerrycan-jobsBackground job engine for the jerrycan framework: at-least-once queues, retries + dead-letter, cron, run_at, over a Postgres…375MITAsynchronousWeb programming jerrycan-macrosProc-macro sugar for the jerrycan framework. https://jerrycan.cc476MITDevelopment tools jerrycan-observeObservability extension for the jerrycan framework: request IDs, JSON logs, /healthz, Prometheus /metrics. https://jerrycan.cc459MITWeb programming jerrycan-ratelimitRate-limiting extension for the jerrycan framework: fixed-window, identity-aware (api-key → user → IP), in-memory or Redis store.…381MITWeb programming jerrycan-realtimeRealtime extension for the jerrycan framework: WebSocket channels for Postgres Changes (logical replication with trigger…345MITAsynchronousWeb programming jerrycan-storageObject-storage extension for the jerrycan framework: design-modeled buckets, local + S3-compatible blob stores, signed URLs,…340MITWeb programming jerrycan-validateValidation extension for the jerrycan framework: Validate trait, Valid extractor, structured 422s, OpenAPI serving.…465MITWeb programming jerryinsz-tg-rcore-tutorial-ch1-uartChapter 1 minimal kernel variant that prints via S-mode UART driver.21GPL-3.0Embedded developmentNo standard library jerryinsz-tg-rcore-tutorial-uartMinimal UART16550 driver for rCore tutorial kernels in RISC-V S-mode.73GPL-3.0Embedded developmentNo standard library jesetOpinionated, ready to use color-eyre and tracing-journald setup for applications1,625MPL-2.0Configuration JESKOderiveGoooey Server Macher Derive595MIT OR Apache-2.0Network programming JESKOserverGoooey Server Macher392MIT OR Apache-2.0Network programming jesperJasper is a simple, yet powerful, error generator for Solidity. It allows you to generate typescript errors from your Solidity…1,489MIT jesseRegister and add signers to the farcaster network easily4,259MIT jessieThe cli tool for the Jessie UI framework.3,769MIT jessie-buildThe library that sets up Jessie apps for build.2,797MIT jessie-cssCSS parsing library for the Jessie UI framework.399MIT jessie-libThe essential library for the Jessie UI framework.5,255MIT jessie-macrosThe macros used by the Jessie UI framework.1,223MIT jessie-ttf-parserA TrueType parser that is meant to keep as much information as possible.1830BSD jessupjn-sb-solA Rust library to interact with Switchboard accounts.1,503MIT jestRust Task Runner1,686MIT OR Apache-2.0 jest-companionRun jest-lua tests from the command line1,225MIT jest_lintLint your Jest unit tests to find problems6,878MITCommand line utilities jest_workaround[SWC plugin] workaround for jest25,196MIT jestdJest-compatible test runner daemon58MIT jestera set of prototyping libraries for cryptographic applications.1,433MIT jesterky-actorjesterky host-side SDK: seam trait helpers, test doubles, and the replay driver.50MIT OR Apache-2.0AsynchronousDevelopment tools jesterky-clijesterky command-line runner and replay checker.39MIT OR Apache-2.0Command line utilitiesDevelopment tools jesterky-contractThe pinned jesterky workflow contract: topology, event, artifact, replay schemas.72MIT OR Apache-2.0Data structuresDevelopment tools jesterky-coreThe jesterky orchestration core: pure graph execution, events, replay. No IO.64MIT OR Apache-2.0AsynchronousData structures jesterky-modelModel-backed host actors for jesterky: the ModelActor seam adapter + the codex (ChatGPT-bundle) model. This is the M1->M2 step —…52MIT OR Apache-2.0AsynchronousDevelopment tools jesterky-proxyNative, self-contained Responses↔chat proxy so the codex CLI (Responses-only) can drive chat-only models (DeepSeek, Gemini, any…26MIT OR Apache-2.0API bindingsDevelopment tools jesterky-qualityThe reference M2 workload: a structured code quality scan (expand -> map audit dimensions -> reduce report) that runs on a…51MIT OR Apache-2.0Development tools jesterky-sandboxSeeded execution workspaces for jesterky agentic actors (local + docker).35MIT OR Apache-2.0 jesusJesus Saves1,695MIT jesus-chrisJesus Chris1,725MIT jetJet API Client for Rust9,791MIT jet-proto-mathA library of math helpers suitable for use in solana programs10,283AGPL-3.0-or-later jet-proto-proc-macrosA library of proc macros for helping with writing solana programs17,499AGPL-3.0-or-later jet-proto-v1-cpiThe anchor CPI interface for jet-v14,205AGPL-3.0-or-later jet1090A real-time comprehensive Mode S and ADS-B data decoder22,583MIT jet_minigrepA test crates.io1,685MIT OR Apache-2.0 jetblack-optionsFunctions for calculating option values and sensitivities, both analytically and using and finite difference methods.258MITFinance jetbrains-toolbox-updaterApplication and library that updates JetBrains Toolbox IDE's on demand using some trickery75,185GPL-3.0-onlyCommand line utilities jetdbPure Rust library for reading Microsoft Access (.mdb/.accdb) files1,584MIT OR Apache-2.0Database interfacesParser implementations jetdb-cliCLI tool for reading Microsoft Access (.mdb/.accdb) files200MIT OR Apache-2.0Command line utilitiesDatabase interfaces jetemailRust SDK for the JetEmail API20MITAPI bindingsEmail jetengineJet engine namespace587Apache-2.0 jetfuelplaceholder1,565Apache-2.0 jetgpioPeripheral Abstraction Layer for Jetson Nano Devices2,774Unlicense jetgpio-sysLow-level Rust bindings for https://github.com/Rubberazer/JETGPIO9,361UnlicenseExternal FFI bindingsHardware support jethA high-performance, coverage-guided, stateful fuzzing framework for Ethereum smart contracts. Write simple, invariant-based tests…339MIT jeth-coreCore runtime library for the Jeth fuzzing framework. Provides a synchronous EVM harness powered by revm, contract interaction…343MIT jeth-macrosProcedural macros for the Jeth fuzzing framework338MIT jetkcliA strongly opininated jira/git command line interface4,448MIT jetkvm_clientA client for JetKVM over WebRTC.452MIT jetkvm_controlA control client for JetKVM over WebRTC.4,075MIT jetpautomation platform3,291GPL-3.0-or-later jetproofA tool for creating huge jetton offchain merkle proofs.3,206MIT jetpwmonRust bindings for Jetson Power Monitor1,971BSD-3-ClauseAPI bindingsEmbedded development jetroJetro - transform, query, and compare JSON9,148MITAlgorithmsEncoding jetro-corejetro-core: parser, compiler, and VM for the Jetro JSON query language598MITAlgorithmsEncoding jetro-experimentalSIMD accelerated structural indexing and Mison algorithm for jetro584MIT jetro-macrosCompile-time macros for jetro: jetro!() and #[derive(JetroSchema)].27MIT jetsA Rust rule-based tunnel4,267Apache-2.0 jetsciiA tiny library to efficiently search strings and byte slices for sets of ASCII characters or bytes.4,713,987MIT OR Apache-2.0 jetsimFast air traffic simulator25MITScienceSimulation