Source: doc.rust-lang.org (std library reference) · crates.io database dump, 2026-07-25 (crates directory)Contact
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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.

l2r0-profiler-hostProfiler for RISC Zero, host side program2,705MIT/Apache-2.0 l2r0-small-serdeAn alternative serialization algorithm for RISC Zero1,539Apache-2.0 l2tpHigh-level L2TP interface for Linux kernel157MIT l3Streamline ZK-Enabled App Development1,680Apache-2.0 l3-37yet another connection pooler1,897MIT OR Apache-2.0 l337yet another connection pooler27,999MIT OR Apache-2.0 l337-postgresl337 manager for tokio-postgres16,758MIT OR Apache-2.0 l337-redisl337 manager for redis24,094MIT OR Apache-2.0 l33t0-emojifyGenerate platform-compatible custom emoji images from text, images, or stdin22MIT l3_api_baseShared APIs for LLL crates4,048BSD-2-Clause l3_cliLambda compute tooling3,497BSD-2-Clause l3_extractextract layer 4 connection from layer 36,084Apache-2.0 l3_fn_buildLib for Lambda function builds3,851BSD-2-Clause l3_fn_configParsing l3.toml config files592BSD-2-Clause l3_fn_envParsing and merging .env files753BSD-2-Clause l3binIntegerized Sinusoidal Binning Scheme for Level 3 Data1,985MITScienceScience::Geospatial l3dLibrary for loading 3D objects.9,574MIT l3d-eguiL3D 3D viewer - works on desktop and web (WASM) with three-d79GPL-3.0-or-laterGraphicsRendering l3d-ffiUniFFI bindings for l3d_rs - for Android (Kotlin), iOS (Swift), and more69MIT OR GPL-3.0-or-laterAPI bindingsDevelopment tools::FFI l3d_rsL3D (Luminaire 3D) file parser for Rust - parse 3D luminaire geometry with transformation matrices, designed for WASM/WebGL…2,629GPL-3.0-or-laterGraphicsParsing tools l3gd20A platform agnostic driver to interface the L3GD20 (gyroscope)44,132MIT OR Apache-2.0Embedded developmentHardware support l3gd20-forkA platform agnostic driver to interface the L3GD20 (gyroscope), forked637MIT OR Apache-2.0Embedded developmentHardware support l3gd20-ngA platform agnostic SPI driver to interface with the L3GD2 gyroscope2,946EUPL-1.2 OR MIT OR Apache-2.0Embedded developmentHardware support l3gd20-registersA typed map of the STMicroelectronics L3GD20 Gyroscope registers4,448EUPL-1.2 OR MIT OR Apache-2.0Embedded developmentHardware support l3l4kitLibrary to convert l3 packets to l4 data and vice versa1,567MITEmbedded developmentNetwork programming l3xoExample of a simple Rust project965MIT l402_middlewareA middleware library for rust that provides handler functions to accept microtransactions before serving ad-free content or any…8,212MIT l402kitL402 (HTTP 402 + Lightning Network) middleware for Rust. Supports axum.224MITNetwork programmingWeb programming l4d2_addon_parserParse L4D2 VPK files and extract info from addoninfo.txt data and the mission data for campaigns, and other utilities179MIT l4pSimple and fast layer 4 proxy in Rust2,769Apache-2.0Web programming l4rsWIP. Reserved name for an L4-like microkernel in Rust1,896MITEmbedded developmentOperating systems l5Reserved crate name for the L5 Engine behind AuditeDB.22MITDatabase interfaces l5m-cliCommand-line tool for L5M: compile memory capsules into segments and run gated queries.15MIT OR Apache-2.0Command line utilitiesDatabase interfaces l5m-coreSecurity-gated memory/retrieval engine: authorization gates (tenant/policy/trust/temporal) run before relevance scoring.20MIT OR Apache-2.0Data structuresDatabase implementations l5m-mcpMCP (Model Context Protocol) server exposing L5M security-gated memory to AI agents.13MIT OR Apache-2.0Command line utilitiesDatabase interfaces l5m-serverHTTP server for L5M security-gated memory: JWT/JWKS auth, scoped keys, per-tenant metering, WAL durability.13MIT OR Apache-2.0Database implementationsWeb programming::HTTP server l5xParser for Rockwell Automation L5X files (Studio 5000 Logix Designer)502MITDevelopment toolsParsing tools l6tA library for reading and writing files used by Line6 Edit, namely Line6 Tone (l6t), Line6 Bundle (l6b), Line6 Tone Collection…1,656MITEncodingMultimedia::Encoding l6t-fileA part of l6t library: reading, writing and deconding for L6T IFF data2,148MIT l6t-symbolicA part of l6t library: symbolic data model for different known devices1,840MIT l8asha restrictive shell for system operators2,717MIT OR Apache-2.0Command line utilities l8rLazy Update Scheduler for Hecs3,372MIT l9961Driver for the ST L9961 Industrial BMS818MIT OR Apache-2.0 l_14adoutest1,639MIT l_calcLevi's world renown calculator that can do some addition and subtraction!1,657MIT l_group_cnfmeets of joins of free group terms2,672MIT OR Apache-2.0 l_group_formulasparsing and encoding l-group (in)equations4,068MIT OR Apache-2.0 l_group_validitychecking validity of l-group (in)equations1,839MIT OR Apache-2.0 l_srtdeRust implementation of the L-SRTDE algorithm for large-scale global optimization.74MITAlgorithmsMathematics l_zipA lightweight library for data compression.29MIT OR Apache-2.0 laLinear algebra library for the Rust programming language.10,965Apache-2.0 la-arenaSimple index-based arena without deletion.3,485,489MIT OR Apache-2.0Data structuresMemory management la-reteA reasonably simple rule-matching engine6,036MIT la-stackFast, stack-allocated linear algebra for fixed dimensions2,135BSD-3-ClauseMathematicsScience la64The Rust bindings of LoongArch64 architectures20GPL-3.0 la_dfa_2_dotCreate graphs from lookahead DFAs generated by `parol`.38MIT OR Apache-2.0AlgorithmsParsing tools laadRust library for parsing information from a TBS battery monitor, such as the Battery Monitor Expert Modular.934MIT labTools for converting RGB colors to the CIE-L*a*b* color space, and comparing differences in color.15,162,329MITMultimedia::ImagesMultimedia::Video lab-libShared types, port allocation, and Docker helpers for the lab-ops workspace24MIT lab-opsPersonal utility tools for my homelab189MITCommand line utilitiesNetwork programming lab-ops_auto-discoverService discovery daemon with Consul registration213MIT lab-ops_lab-libShared types, port allocation, and Docker helpers for the lab-ops workspace245MIT lab-ops_natmapiptables NAT mapping daemon with CLI control over Unix socket275MIT lab-resource-managerGPU and room resource management system with Google Calendar and Slack integration475MIT OR Apache-2.0API bindingsCommand line utilities lab-rsToolkit and library for reading, writing, and manipulating HTK .lab label files71MITCommand line utilitiesMultimedia::Audio lab_graderA crate to help grade labs and assignments24,205MITCommand line utilities labageBiological aging clocks — multi-modal age estimation from blood, epigenetic, and proteomic data20non-standard labassessScore biomarkers against longevity-optimal ranges20non-standard labcoat-testHost-side Rust test harness for Labcoat Alkanes WASM contracts23MIT labelLabel functions and iterate over them.15,904MIT label-converterTurn HTML string into png for label printing8,973AGPL-3.0-onlyCommand-line interfaceCommand line utilities label-generatorGenerate labels using components5,266MIT label-loggerCargo-like logging library18,914CECILL-2.1Rendering label-macrosLabel functions and iterate over them.28,231MIT label-propagationLabel Propagation Algorithm by Rust2,927MIT label_attributeProcedural attribute macro for lhlist4,144non-standard label_graphA simple to use graph implementation, allowing random access to nodes via labels.1,440MIT/Apache-2.0AlgorithmsData structures label_studio_yolo_datasets_converterA tool for converting datasets from Label Studio to YOLO format.2,300MITCommand-line interfaceCommand line utilities labeledDynamic information-flow-control labels1,540non-standard labeledarrayLabeledArray: labeled n-dimensional arrays with spatial-aware helpers for geospatial and scientific workflows.557MIT labeledgraphA flexible graph library for rust4,314MIT labelflairGenerate colorful labels for GitHub Issues1,554Apache-2.0 OR MIT labelflair-cliGenerate a colorful GitHub Issues labels from your terminal1,352Apache-2.0 OR MIT labelgraphA simple to use graph implementation, allowing random access to nodes via labels.21,528MIT/Apache-2.0AlgorithmsData structures labelizeFast ZPL & EPL label parser and renderer — convert label data to PNG/PDF. Open-source Labelary alternative.581MITGraphicsParsing tools labelled-enumConverting an enum to/from String2,906MIT labelled-enum-deriveConverting an enum to/from String2,304MIT labelloSimple label encoder with configurable types5,629Apache-2.0/MIT labelmakerCreate & enforce sets of labels in GitHub repositories8,108MITCommand line utilities labelo_p710bta print driver for the P-Touch P710BT Label Printer1,448Apache-2.0 OR MIT labelsThis crate provides labels for functions to document their test status: tested, untested, parent_tested...2,865AGPL-3.0-or-later labgeneticsGenetic variant analysis — pathogenicity, pharmacogenomics, and polygenic risk20non-standard labhistoryMedical history records — allergies, conditions, family history, surgical history20non-standard labhubBot for running builds against GitHub with GitLab CI16,592UnlicenseDevelopment toolsDevelopment tools::Build Utils labirustNaive rust crate for implementing and testing maze solving Algorithms.7,856MIT labirust-cliA cli to run labirust algorithms.1,569MIT labisuA library implementing algorithms finding large bipartite subgraphs.2,798MIT OR Apache-2.0 labjack_ud_rsRust Bindings for the LabJack UD Library830MIT labkey-rsUnofficial Rust client for the LabKey Server REST API248MIT OR Apache-2.0API bindingsScience labnotesClinical notes & timeline CLI — longitudinal patient knowledge base18non-standard laboratoryA simple, expressive unit test framework for Rust20,099MITDevelopment tools::DebuggingDevelopment tools::Profiling labparseParse lab results into structured biomarker JSON23non-standard labradorLabrador - Mini thirdpart client for rust.18,807MITAPI bindings labrador-ldpcEncoders and decoders for CCSDS LDPC error correcting codes15,113MITEmbedded developmentNo standard library labradormailLabradormail is a fork of neomutt in Rust, adapted to use agent-inbox-protocol.19GPL-2.0 labram-rsLaBraM EEG Foundation Model — inference in Rust with Burn ML244Apache-2.0MathematicsScience labranet-commonlabranet common lib5,711MIT labratA FurAffinity library.1,651AGPL-3.0-or-later labrinthGenerated Rust client for the Labrinth API58MIT labrpcA RPC framework for testing6,744MIT labs-oneshotScript to update ArchLABS7,212MIT labscriptPrescription PDF generator with e-signature and QR verification20non-standard labstorePatient biomarker database CLI — longitudinal tracking, trends, and export18non-standard labtLab-t Lightweight Android build tool7,409non-standardCachingDevelopment tools::Build Utils labt-proc-macroProc macros for Labt1,961BSD-2-Clause labtimerA worldline-accurate CLI timer1,169MITCommand line utilities labtuiblazing fast terminal-ui for git and GitLab21MITCommand line utilities labtui-asyncgitallow using git2 in a asynchronous context42MITAsynchronousConcurrency labtui-git2-hooksadds git hooks support based on git2-rs50MITDevelopment tools laburnumAn LSP framework for building language servers and compilers, powered by an incremental query tree with content-addressed…1,607BlueOak-1.0.0CachingCompilers laburnum-syntax-macroProc-macros for defining CST and AST node types in language frontends built with the laburnum LSP framework.101BlueOak-1.0.0CompilersDevelopment tools labview-interopTypes and wrappers for interperating with LabVIEW when called as a library9,990MIT labware_trackerMy first cargo test - A labware tracker1,983MIT/Apache-2.0 labySmall macro HTML templating library13,962MITTemplate engine laby_commonShared code required by laby9,569MIT laby_macrosHTML transformation macros for laby11,302MIT labyrA PDDL benchmarker23,236GPL-3.0-only labyrinthGenerate and solve maze1,507MPL-2.0 labyrinth_macrosA procedural macro crate for the cryptify crate meant to provide obfuscation through compile time string encryption. not meant to…335,457MIT lacLo Audio Codec — lossless audio codec with LPC + partitioned Rice coding.26AGPL-3.0-onlyCompressionMultimedia::Audio lacana high performance zero-config metric implementation1,662Apache-2.0 laceA probabilistic cross-categorization engine17,697MIT lace-cliA probabilistic cross-categorization engine4,220BUSL-1.1 lace-nativeRust bindings for the Lace work-stealing framework for multi-core fork-join parallelism30Apache-2.0AlgorithmsConcurrency lace-native-buildBuild-time code generator for lace-native task definitions30Apache-2.0Development tools::Build Utils lace-wswork-stealing library based on the lace deque394Apache-2.0 lace-ws-macroswork-stealing library based on the lace deque374Apache-2.0 lace_ccCore of the Lace cross-categorization engine library16,652BUSL-1.1 lace_codebookContains the Lace codebook specification as well as utilities for generating defaults17,393BUSL-1.1 lace_constsDefault constants for Lace10,868BUSL-1.1 lace_dataData definitions and data container definitions for Lace10,907BUSL-1.1 lace_gewekeGeweke tester for Lace11,453BUSL-1.1 lace_metadataArchive of the metadata (savefile) formats for Lace. In charge of versioning and conversion.15,872BUSL-1.1 lace_statsContains component model and hyperprior specifications13,899BUSL-1.1 lace_utilsMiscellaneous utilities for Lace and shared libraries11,420BUSL-1.1 lachesisGPS stop point detection from Hariharan and Toyama (2004) 'Project Lachesis: Parsing and Modeling Location Histories'3,820non-standard lachsCrate for automatically creating a lexer based on a given enum5,220MIT lachs_deriveDerive macro for creating a lexer5,475MIT lackeyAn AI agent framework - your obedient helper22MIT OR Apache-2.0 lackey-coreCore types and traits for the Lackey AI agent framework128MIT OR Apache-2.0 lackey-extensionsExtensions and plugins for the Lackey AI agent framework78MIT OR Apache-2.0 lackingA game engine/framework port from Go2,712MIT laconicInterpreter for Laconic expressions and scripts, both as a library component and command-line executable1,111MIT OR Apache-2.0 lacquerStyle definitions for gorgeous terminal layouts 💅871MIT OR Apache-2.0Command-line interfaceGUI lacsSimple CLI tool that displays files in a directory sorted by their last accessed time1,238MITCommand-line interface lactLact4,464MIT OR Apache-2.0 lact_corsBasic cors middleware for Lact1,487MIT OR Apache-2.0 lact_methodMethods used for Lact3,076MIT OR Apache-2.0 lact_statusStatus codes used for Lact3,044MIT OR Apache-2.0 lacunaRegulatory gap analysis CLI — compare circulars against policy baselines with paragraph-level citations15MITCommand line utilities lacuna-rsGhost-frame call-stack spoofing via .pdata lacunae + runtime indirect syscalls for Windows x6422MITOperating systems::Windows APIs lacunaeRegulatory gap analysis CLI — compare circulars against policy baselines with paragraph-level citations22MITCommand line utilities lacyFast magical cd alternative for lazy terminal navigators4,443MITCommand line utilities ladA simple DooM WAD file loader/reader3,765Apache-2.0 ladataA simple & modular data model.11,532MIT OR Apache-2.0Data structuresNo standard library::No dynamic allocation ladderThis is a multilingual word learning software.2,707non-standard laddro-careerRust SDK for the Laddro Career API38MITAPI bindings ladduAmplitude analysis made short and sweet33,528MIT OR Apache-2.0MathematicsScience laddu-amplitudesAmplitudes for the laddu library13,888MIT OR Apache-2.0 laddu-coreCore of the laddu library13,515MIT OR Apache-2.0 laddu-extensionsExtensions to the laddu library13,360MIT OR Apache-2.0 laddu-generationMonte Carlo event generation tools for laddu296MIT OR Apache-2.0 laddu-pythonAmplitude analysis made short and sweet13,380MIT OR Apache-2.0MathematicsScience ladeAutomatically load secrets from your preferred vault as environment variables, and clear them once your shell command is over.36,603MPL-2.0 lade-sdkLade SDK47,140MPL-2.0 laderLader5,514MIT OR Apache-2.0 lader_corsLader Cors middleware1,501MIT OR Apache-2.0 ladfileLanguage Agnostic Declaration (LAD) file format for the bevy_mod_scripting crate6,448MIT OR Apache-2.0Game development ladfile_builderLanguage Agnostic Declaration (LAD) file format for the bevy_mod_scripting crate9,208MIT OR Apache-2.0Game development ladingA tool for load testing daemons.2,806MITDevelopment tools::Profiling lading-captureA tool for load testing daemons.4,324MITDevelopment tools::Profiling lading-throttleA tool for load testing daemons.1,554MITDevelopment tools::Profiling ladleCommand-line tool for Lyquor node management.25Apache-2.0 ladonFast multi-chain HD wallet CLI and address-pool daemon: EVM, Bitcoin, Solana140MITCommand line utilitiesCryptography ladrc-no-stdno_std LADRC controllers for embedded Rust42MIT OR Apache-2.0AlgorithmsEmbedded development ladspaAn interface for writing LADSPA plugins safely in Rust.137,920Unlicense ladspa-sysraw bindings to LADSPA 1.1 generated with bindigen1,717LGPL-2.1-or-later ladspa_noisecoringA LADSPA noise reduction filter.1,982LGPL-2.1 lady-deirdreCompiler front-end foundation technology. Main Crate.12,250non-standardCompilersData structures lady-deirdre-deriveCompiler front-end foundation technology. Macro crate.13,009non-standardCompilersData structures ladybugA small library for triggering a logic analyzer from program events3,786BSD-3-ClauseDevelopment tools::DebuggingEmbedded development laer-image-conceptbasic image cpncepts of laer89MIT lafereA more or less simple communication protocol library.2,362MIT OR Apache-2.0 lafere-apiA more or less simple communication protocol library.2,049MIT OR Apache-2.0 lafere-api-codegenCodegen for lafere api2,176MIT OR Apache-2.0 lafontAnimation of Yves Lafont's Interaction Combinators1,978Apache-2.0 lafsLeast-Authority File Store utils3,235MITCryptography lafs-coreCanonical LAFS envelope types and validation for CLEO ecosystem139MIT OR Apache-2.0API bindingsData structures laftel-rsA Rust wrapper for the Laftel.net API77GPL-3.0-onlyAPI bindings lagA TUI for viewing elapsed times in log files3,517MIT