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.

lastdayofmonthCalculate all the the last weekdays of a month for a year: ex last Sundays in 20222,761CC0-1.0 lastfmAn async client to fetch your Last.fm listening history or the track you are currently playing16,335MITAPI bindings lastfm-clientA modern, async Rust library for fetching and analyzing Last.fm user data621MITAPI bindingsWeb programming lastfm-editRust crate for programmatic access to Last.fm's scrobble editing functionality via web scraping15,217MIT lastfm-rsA friendly Rust library for working with the Last.fm API.15,266MITAPI bindings lastfm-rustRust library for accessing the Last.fm API.965MITAPI bindings lastid-sdkRust SDK for LastID IDP integration - request and verify credentials with type-safe policy builders20MIT OR Apache-2.0AuthenticationCryptography lastlogSimple rust crate to read linux lastlog6,865MITOperating systemsParser implementations lastpassAn unofficial interface to the LastPass API.1,741GPL-2.0-or-laterAPI bindingsAsynchronous laststagefast, durable, high concurrent HashMap4,121Apache-2.0 laststrawA lightweight GUI Rust framework for quick desktop applications.6,684MIT OR Apache-2.0GUIRendering laststraw-coreCore library for the lightweight GUI Rust framework Last-Straw.11,152MIT OR Apache-2.0GUIRendering laststraw-core-macroProcedural macros for the lightweight GUI Rust framework Last-Straw.1,346MIT OR Apache-2.0GUIRendering lasttimecheck if stdin items are in a list read from a file1,506GPL-3.0Command line utilities lastuiCommand line tool to access Last.fm api and commands43MITCommand line utilities lasv2Faithful port of LAPACK's LASV2 subroutine.309non-standard lasyA small library dedicated to LASER path optimisation.59,834MIT OR Apache-2.0 laszip-sysLow level bindings to laszip5,227MITCompressionExternal FFI bindings lateasy matrix manipulation on a component wise level - no linear algebra1,686MIT lat-longGeographic latitude/longitude coordinate types with multiple numeric backends248MIT OR Apache-2.0Data structuresNo standard library latchfast and efficent Latch supporting both sync and async modes1,303Apache-2.0 OR MITAsynchronousConcurrency latch-billingPure synchronous token billing core library - types, traits, and pricing models42Apache-2.0 latch-cachePrompt cache metadata planning and injection helpers for Latch70Apache-2.0 latch-compressStateless history compression primitives for Latch66Apache-2.0 latch-coreNeutral shared types and configuration for the Latch gateway SDK430Apache-2.0 latch-detectBackend engine auto-detection utilities for Latch67Apache-2.0 latch-langLatch — a minimal scripting language for local automation and tool orchestration132MITCommand line utilitiesDevelopment tools latch-meterPer-session metering, quotas and cost estimation for Latch67Apache-2.0 latch-retryRetry, fallback and circuit-breaker policy primitives for Latch68Apache-2.0 latch-routerSynchronous heuristic model/pool router for Latch73Apache-2.0 latch-scoreUniversal endpoint quality scoring engine195Apache-2.0 latch-sdkFeature-gated SDK crates for Latch gateway capabilities41Apache-2.0 latch_iterA latching iterator adapter2,796MIT latchesA downward counter (CountDownLatch) which can be used to synchronize threads or coordinate tasks4,136,481MIT OR Apache-2.0AsynchronousConcurrency latchlmA provider-agnostic client library for AI models605MPL-2.0API bindingsAsynchronous latchlm-coreCore traits and types for the LatchLM ecosystem1,951MPL-2.0API bindingsAsynchronous latchlm-geminiGoogle Gemini provider implementation for LatchLM162MPL-2.0API bindingsAsynchronous latchlm-macrosMacros for LatchLM390MPL-2.0API bindingsAsynchronous latchlm-openaiOpenAI provider implementation for LatchLM164MPL-2.0API bindingsAsynchronous latchlm-openrouterOpenRouter provider implementation for LatchLM160MPL-2.0API bindingsAsynchronous lateAPI reference for Zernio. Authenticate with a Bearer API key. Base URL: https://zernio.com/api8,623Unlicense late-java-coreA Rust library for launching Minecraft Java Edition201CC-BY-NC-4.0Game developmentWeb programming::HTTP client late-staticInitialize static variables at runtime11,870MIT late-structLate-bound structure definitions.924MITRust patterns late2htmA Rust library for converting LaTeX-formatted text into HTML with minimal styling.537MPL-2.0 late_formatLate formatting of string parameters5,558MIT OR Apache-2.0 late_substitutionLate substitution of string parameters2,320MIT OR Apache-2.0 lateinitUnsafe late-initialization for statics.7,747MIT lateinit-variableLateinit for Rust!1,255MIT latencylow-latency timing library102MITDevelopment tools::Profiling latency-bucketsStreaming histogram + percentile estimator for LLM call latencies. Fixed log-scale buckets, O(1) record, p50/p90/p95/p99 in…19MIT OR Apache-2.0Data structuresScience latency_tracesupports latency measurement for functions and code blocks, both sync and async.4,695MITDevelopment tools::Profiling latency_trackerA high-performance, lock-free latency percentile tracker. `LatencyTracker` is designed for extremely high write throughput in…36MIT latent-inspectorFast CLI for inspecting and comparing learned representations across self-supervised vision models19MIT OR Apache-2.0 latentdirichletallocationA Rust implementation of Latent Dirichlet Allocation (LDA) using collapsed Gibbs sampling for topic modeling.96non-standardText processing latentseasRuntime for durable stateful workers18MIT laterDistributed Background jobs manager and runner for Rust12,265MIT/Apache-2.0Web programming later-deriveMacro to generate stub for later: Background jobs manager and runner for Rust8,344MIT/Apache-2.0 later_operatorParsable, storable, printable comparison operators, w/ optional serde support.10,998WTFPL lateraLaTeX Template engine based on Tera1,583MITTemplate engine lateralA simple process parallelizer to make lives better at the commandline.5,683MIT latesA minimal code template manager. Register and use code templates with ease.18MITCommand line utilities latestA channel-esque type that only stores the last value that was sent.12,387MIT latest-versionCheck deps.dev for the latest version of artifacts4,196MIT OR Apache-2.0Command line utilities latest_user_agentRust library for generating latest browser user agent.6,268UnlicenseAuthenticationNetwork programming latestmaplatest map6,733MIT latexAn ergonomic library for programatically generating LaTeX documents and reports.17,931MITTemplate engineText processing latex-astAST parser for LaTeX, WIP.3,726AGPL-3.0-or-laterCompilersEncoding latex-contract-frontendLaTeX → contract equations parser. Handles math mode AND theorem-class environments. Phase 4.238MIT OR Apache-2.0 latex-mathCommand-line interface (CLI) tool and library for parsing and representing mathematical expressions54MITCommand-line interfaceCommand line utilities latex-packerCLI that goes though the file and subsequent \input, \include and packs all the content to the single output file.1,151MIT latex-thebibClean and sort legacy TeX bibliographies written using 'thebibliography' via the `refactor` sub-command. Compile BibTeX files to…8,501MIT latex-to-htmlLatex to html converter4,016GPL-3.0 latex2mathmlConvert LaTeX equations to MathML85,379MITScience latex_cleanerUtility for cleaning LaTeX intermediary files from the current directory or one passed in8,470MIT latex_snippetConvert even erroneous LaTeX snippets into HTML20,993GPL-3.0-or-later latexcleanA command line application to remove auxiliary files generated by LaTeX tools1,665MITCommand line utilities latexcompileThe is a small wrapper around pdflatex oder some other command.2,480non-standard latexdefA command-line tool which shows the definitions of LaTeX commands.7,491LPPL-1.3cCommand line utilitiesDevelopment tools latexifyShared definition for turn a rust object into latex code12,346MPL-2.0 LatexImgGen-libA rust crate for generating Latex images of equations with an edition number to avoid cache flushing and timestamp attributes4,272Apache-2.0 latexlingsSmall exercises to learn writing, debugging, and typesetting LaTeX in the terminal — inspired by rustlings20MITCommand line utilities latexmk-diff-headLaTeX compilation tool that generates diff PDFs against Git commits1,837MITCommand line utilitiesText processing latexmlA TeX to XML/HTML/ePub converter: a LaTeXML reimplementation in Rust1,166CC0-1.0Command line utilitiesScience latexml-runnerRust runner for high-performance TeX to HTML conversions with latexml9,484MITCommand line utilities latexml_codegenSyntax extension plugins for LaTeXML's binding language28CC0-1.0 latexml_contribUser-contributed bindings for personal use21CC0-1.0 latexml_coreCore conversion capabilities of latexml_oxide31CC0-1.0 latexml_engineCore TeX/LaTeX engine bindings (Base, TeX_*, eTeX, pdfTeX, plain, latex pools). Split out of latexml_package to reduce CI…26CC0-1.0 latexml_math_parserMarpa-style ambiguous math-expression parser for latexml_oxide21CC0-1.0 latexml_packageBindings and related infrastructure for core processing23CC0-1.0 latexml_postPost-processing pipeline for latexml_oxide (Rust port of LaTeXML::Post)21CC0-1.0 latexsnipper-api-typesPublic API types for LaTeXSnipper Core103AGPL-3.0 latexsnipper-artifactRuntime artifact lineage for LaTeXSnipper processing23AGPL-3.0Command line utilitiesMathematics latexsnipper-astDocument AST — the single source of truth for all data models220AGPL-3.0Command line utilitiesMathematics latexsnipper-conversionFormat conversion — AST to LaTeX/OMML/MathML/Typst/Markdown112AGPL-3.0Command line utilitiesMathematics latexsnipper-engineCore engine — orchestrates all capabilities66AGPL-3.0Command line utilitiesMathematics latexsnipper-exportExport capability — RenderTree + SVG/PNG/PDF generators102AGPL-3.0Command line utilitiesMathematics latexsnipper-foundationFoundation layer — Error, Result, Logging, Config, Event237AGPL-3.0Command line utilitiesMathematics latexsnipper-imageImage processing capability — decode, transform, encode170AGPL-3.0Command line utilitiesMathematics latexsnipper-incrementalExperimental source-aware incremental document sessions15AGPL-3.0Command line utilitiesMathematics latexsnipper-inferenceInference capability — Detection, Recognition, Layout120AGPL-3.0Command line utilitiesMathematics latexsnipper-modelModel management — manifest, config, download, cache146AGPL-3.0Command line utilitiesMathematics latexsnipper-pipelineLaTeXSnipper Core — one-line image to LaTeX/Markdown/Typst81AGPL-3.0Command line utilitiesMathematics latexsnipper-runtimeRuntime abstraction — Session, Provider, ModelHandle148AGPL-3.0Command line utilitiesMathematics latexsnipper-runtime-coremlNative Core ML runtime backend for LaTeXSnipper15AGPL-3.0Command line utilitiesMathematics latexsnipper-runtime-executorchExecuTorch runtime backend for LaTeXSnipper15AGPL-3.0Command line utilitiesMathematics latexsnipper-runtime-paddlePaddle Inference runtime backend for LaTeXSnipper15AGPL-3.0Command line utilitiesMathematics latexsnipper-runtime-plugin-apiVersioned C ABI and trusted loader for LaTeXSnipper runtime plugins15AGPL-3.0Command line utilitiesMathematics latexsnipper-runtime-tensorrtNative TensorRT runtime backend for LaTeXSnipper15AGPL-3.0Command line utilitiesMathematics latexsnipper-syntaxSyntax layer — Parser + Renderer for LaTeX/OMML/Typst/Markdown114AGPL-3.0Command line utilitiesMathematics latexsnipper-tensorTensor type — shared across Image, Inference, Runtime168AGPL-3.0Command line utilitiesMathematics lathescan resistant concurrent cache eviction manager1,548GPL-3.0AlgorithmsCaching lathe-cliCommand-line interface for defining and running Lathe AI agent pipelines47GPL-3.0-only lathe-coreCore graph, executor, and node types for building YAML-defined AI agent pipelines45GPL-3.0-only lathe-serverAxum HTTP server for exposing Lathe AI agent pipelines as an API27GPL-3.0-only latherA Rust crate and Python extension for modeling starspot effects on radial velocity and photometric observations, inspired by…2,036MIT/Apache-2.0ScienceSimulation latihan-pelajaran-bahasa-pemograman-rust-pzn-say-hellothis is say hello libarary223Apache-2.0 latinA standard library with a focus on common operations.15,260MIT/Apache-2.0 latin-samplerAn MCMC sampler for generating approximately uniform random Latin squares using the Jacobson-Matthews algorithm589MITAlgorithmsMathematics latin1strWindows-1252 string types7,180MIT OR Apache-2.0 latin_endingsLatin language endings and declensions14MIT OR Apache-2.0 latin_squareFunction for generating Latin squares and subsets of Latin squares (e.g. Sudoku or Towers/Skyscraper).1,174GPL-2.0-only latin_squaresFunction for generating Latin squares and subsets of Latin squares (e.g. Sudoku or Towers/Skyscraper).3,871GPL-2.0-only latingaHigh-performance, Zero-Copy Uzbek Cyrillic-Latin transliterator.69MIT OR Apache-2.0Text processing latinifyJust another super-simple Pig Latin translator...1,600MITCommand line utilities latinrsRust package that transliterates text and characters into thier latin form.1,329MIT latioslatios is a simple todo tui application designed45MIT latitudeDynamic runtime DDL based on `sqlx` and `barrel`5,622MIT OR Apache-2.0 latitude-sdkA crate for integrating with the Latitude API.972MITAPI bindingsNetwork programming latkeA tool for hashing files on a filesystem to locate duplicates.1,572MIT OR Apache-2.0Command line utilitiesFilesystem latkerlo-jvotciTools for creating and decomposing Lojban lujvo.17,729MIT OR Apache-2.0Command line utilitiesParser implementations latlngRust SDK for the latlng.work geocoding and places API18MITAPI bindingsWeb programming::HTTP client latlonParse latitude/longitude from many common formats11,543MITParser implementationsScience latlongWrapper type for common coordinate systems464Apache-2.0 OR MIT latrA lightweight, low-overhead span-based latency profiler for Rust.25MIT OR Apache-2.0Development tools::Profiling latrix-laicMechanism-layer transport and contract protocol for AI systems61Apache-2.0 latteMacro crate that expands Mocha syntax to standard Rust syntax4,413MIT latte-cliA database benchmarking tool for Apache Cassandra11,113Apache-2.0 latte_fsA lib for doing filesystem and virtual filesystem with tar as output2,027MITFilesystem lattescriptLatteScript is a WIP language written in Rust aiming to be unique from other languages4,156GPL-3.0-or-later lattiLatti is tool to run data apps1,415Apache-2.0 latticeA markdown predicate linter and backlink reconciler, shipped as an LSP server.185AGPL-3.0-or-laterCommand line utilitiesDevelopment tools lattice-clientRust gRPC client SDK for the Lattice distributed workload scheduler1,118Apache-2.0 lattice-commitmentsStructured lattice commitments from Baum16.1,933MIT OR Apache-2.0 lattice-commonShared types, configuration, and error handling for Lattice scheduler1,233Apache-2.0 lattice-coreSimple Lattice/Graph Library21Apache-2.0 lattice-crypto-rsLattice-based cryptography primitives: LWE encryption/decryption, Ring-LWE structures, Gaussian sampling, and lattice basis…19MIT OR Apache-2.0AlgorithmsCryptography lattice-dbA high-performance, embedded graph database optimized for fast set-based search. Built on Roaring Bitmaps and Redb for instant…40MITAlgorithmsCaching lattice-db-clientTyped Rust client SDK for lattice-db — wraps the NATS request/reply protocol283Apache-2.0Database interfacesWebAssembly lattice-embedSIMD-accelerated vector operations and embedding generation10,823Apache-2.0 lattice-fannFast neural network primitives for Lattice - tiny models, fast inference4,229Apache-2.0 lattice-graphSet of Lattice(Grid) based Graph Structures6,973MPL-2.0Data structuresGame development lattice-inferencePure Rust transformer inference engine — safetensors loading, SIMD matmul, BGE/Qwen3 embeddings11,525Apache-2.0 lattice-kyberPure Rust implementation of ML-KEM (FIPS 203) / CRYSTALS-Kyber post-quantum key encapsulation mechanism324MITCryptographyNo standard library lattice-qcd-rsLattice QCD simulation2,850MIT OR Apache-2.0 lattice-safePost-quantum cryptography suite — ML-DSA (FIPS 204) + FN-DSA (FIPS 206) + ML-KEM (FIPS 203)27MITCryptographyNo standard library lattice-safe-suitePost-quantum cryptography suite — ML-DSA (FIPS 204) + FN-DSA (FIPS 206) + ML-KEM (FIPS 203) + SLH-DSA (FIPS 205)195MITCryptographyNo standard library lattice-sdkRust SDK for lattice_sdk generated by Fern477MIT lattice-slh-dsaPure Rust implementation of SLH-DSA (FIPS 205) / SPHINCS+ post-quantum digital signature scheme1,400MITCryptographyNo standard library lattice-sql-clientTyped Rust client SDK for lattice-sql — SQL frontend for lattice-db263Apache-2.0Database interfacesWebAssembly lattice-transportOptimal transport math (Sinkhorn, Wasserstein, barycenters) for Lattice390Apache-2.0 lattice-tuneTraining infrastructure for Lattice neural models399Apache-2.0 lattice_qcd_rs-procedural_macroSet of procedural macro for the main library lattice_qcd_rs3,613MIT OR Apache-2.0 latticearcProduction-ready post-quantum cryptography. Hybrid ML-KEM+X25519 by default, all 4 NIST standards (FIPS 203–206), and FIPS 140-3…520Apache-2.0AuthenticationCryptography latticeclientA command-line utility for interacting with a waSCC lattice14,503Apache-2.0API bindingsCommand line utilities latticeonA math and ECS library focused on easy academic reproduction of animation, physics simulation, and AI22MIT OR Apache-2.0 latticeon-macrosProcedural macros for latticeon (derive Processor, Component)83MIT OR Apache-2.0 latticequeriesAllows for fast hierarchical queries on Vecs4,962MIT OR Apache-2.0 latticesLattice data types for simplifying distributed state by providing associativity, commutativity, and idempotence.261,190Apache-2.0 lattices_macroProcedural macros for the `lattices` crate.239,670Apache-2.0 latticeworkCLI for stacked branches and PRs120MITCommand line utilitiesDevelopment tools lattisA simple lattice/graph library17Apache-2.0 lattixKnowledge graph data structures13,662MIT OR Apache-2.0AlgorithmsData structures lattix-coreGraph/KG substrate: triples + PageRank + random walks75MIT OR Apache-2.0AlgorithmsData structures latuiconA terminal UI icon picker for emoji, kaomoji, Unicode characters, and Nerd Font glyphs99MITCommand line utilities latxLattices, reciprocal lattices, periodic-image enumeration, and k-point meshes for periodic electronic-structure calculations.497MIT OR Apache-2.0MathematicsScience lau-a2a-protocolAgent-to-Agent protocol layer for PLATO19MIT lau-a2uiAgent-to-UI rendering protocol — rendering-system-agnostic state representation19MIT lau-a2ui-protocolAgent-to-UI protocol — the wire format for multi-target UI state rendering18MIT lau-adinkraAdinkra symbols as compressed behavioral signatures for PLATO agents18MIT lau-affordanceEnvironment-as-teacher layer — affordances that guide agent behavior through walls, not instructions19MIT lau-agent-dreamThe dream cycle — what happens when an agent is idle19MIT lau-agent-homeostasisAgent homeostasis — self-regulating mechanisms that keep an agent alive and balanced19MIT lau-agent-organismThe agent the mathematics wants — thermodynamically closed, cohomologically self-aware, categorically closed organism21MIT lau-agent-runtimeSelf-compiling agent runtime — agents build their own interpreters, compilers, and runtimes19MIT lau-agent-shellPLATO agent shell — an agent in a room, with a game character on the outside20MIT lau-agent-thermodynamicsFull thermodynamic treatment of agents — Landauer bound, Carnot efficiency, Maxwell's demon, Szilard engine, fluctuation…21MITMathematicsScience lau-agent-unifyUnified type system for room ensigns and git-native agents20MIT lau-algebraic-geometryComputational algebraic geometry: varieties, ideals, Groebner bases, elimination theory, and polynomial system solving22MIT lau-algebraic-topologyFundamental algebraic topology: simplicial/singular homology, cohomology, Mayer-Vietoris, Poincaré duality, homotopy groups, CW…19MIT lau-approximation-theoryApproximation theory: polynomial/spline interpolation, least squares, Chebyshev polynomials, Padé approximants, Remez algorithm,…19MIT lau-async-tickTHE async tick engine — non-blocking tick processing with priority queues19MIT lau-banach-agentsBanach space theory for agents - functional analysis, fixed point theorem, spectral theory19MIT lau-categorical-homotopyHomotopy type theory meets agent systems — paths, homotopies, fundamental groupoids, and higher inductive types as agent…19MIT lau-categorical-mechanicsCategorical foundations unifying symplectic mechanics and agent behaviors17MIT lau-category-theoryAbstract category theory in Rust — categories, functors, natural transformations, adjunctions, limits, colimits, monads, and the…19MIT lau-chaos-theoryChaos theory and nonlinear dynamics: Lyapunov exponents, fractals, strange attractors, bifurcation analysis, symbolic dynamics,…19MIT lau-closureThe missing center — Universal Dirac operator and closure object proving all 14 executable theorems share one spectrum17MIT lau-complex-agentsComplex analysis and holomorphic dynamics for agents19MIT