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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.

fefixFIX & FAST (FIX Adapted for STreaming) in pure Rust.95,572MIT OR Apache-2.0 Encoding Network programming fefix_deriveCode generation for FerrumFIX93,770MIT OR Apache-2.0 Encoding Network programming fefixpFIXS implementation in pure Rust.1,684MIT OR Apache-2.0 Encoding Network programming fefixsFIXP implementation in pure Rust.1,698MIT OR Apache-2.0 Encoding Network programming fehlerA library for error-handling syntax in Rust859,948MIT OR Apache-2.0 fehler-macrosMacros des Fehlers861,012MIT OR Apache-2.0 fehler-moreAdditional macros for Fehler1,856MIT feiertageGerman holidays for time1,490MPL-2.0 feignRest client of Rust13,541MIT feign-macrosRest client of Rust13,483MIT feignhttpDeclarative HTTP client for rust33,607MIT Web programming::HTTP client feignhttp-codegenFeignHTTP macro support29,614MIT feignhttp-rsDeclarative HTTP client for rust80MIT Web programming::HTTP client feignhttp-rs-codegenFeignHTTP macro support44MIT feimModular crate for working with images in Rust713WTFPL feishuFeishu Bot1,579MIT feishu-sdkFeishu/Lark SDK for Rust9,940MIT API bindings Web programming feishubotFeishu Bot1,589MIT feistelGeneric Feistel Cipher1,175MIT OR Apache-2.0 Algorithms Cryptography feistel-netFeistel network cipher construction: balanced/unbalanced Feistel, key schedule, S-box design, permutation networks18MIT OR Apache-2.0 Algorithms Cryptography feistel-permutation-rsConstant time, constant space permutations with Feistel Network ciphers.3,123,394GPL-3.0-or-later feistel_rsFeistel Cipher. More flexible in parameters and keys. Goal is up to single bits and bit slices. Currently on byte granularity.1,709GPL-3.0-or-later feistelnetSymetric block split Feistel Network39CC0-1.0 OR Unlicense feiy_prac_artfeiy's first proac cate.1,266MIT OR Apache-2.0 fejix-compilerFejix Markup Language build tool4,760MIT fekanA library for building and training Kolmogorov-Arnold neural networks.14,782MIT OR Apache-2.0 Mathematics Science felEmerging smart contract language for the Ethereum blockchain1,894MIT fel-cliCLI tools for dealing with Allwinner devices in FEL mode, in pure Rust.10,444MIT/Apache-2.0 Command line utilities Embedded development fel-coreFormspec Expression Language — parser, evaluator, and dependency analysis173AGPL-3.0-only fel4-configParsing, transformation and validation for feL4 manifests5,397non-standard felcEmerging smart contract language for the Ethereum blockchain1,790MIT feldA programming language1,510MIT feld-clicli for the arcane4,492MIT felderaFeldera Continuous streaming analytics engine CLI tool1,557MIT OR Apache-2.0 feldera-adapterlibConnector support for the Feldera streaming engine1,315MIT OR Apache-2.0 Parsing tools feldera-buffer-cacheWeighted in-memory buffer caches with LRU and S3-FIFO eviction4,302MIT OR Apache-2.0 feldera-cloud1-clientTelemetry Client for Feldera Cloud120,874MIT OR Apache-2.0 feldera-fxpFixed-point decimal with fixed precision and scale30,608MIT OR Apache-2.0 Mathematics feldera-ijsonA more memory efficient replacement for serde_json::Value34,124MIT OR Apache-2.0 feldera-irIntermediate representation types for Feldera Programs45,247MIT OR Apache-2.0 Database interfaces feldera-macrosContinuous streaming analytics engine5,429MIT OR Apache-2.0 Algorithms Data structures feldera-observabilityShared observability utilities for Feldera services3,219MIT OR Apache-2.0 feldera-rest-apiREST API bindings for Feldera38,048MIT OR Apache-2.0 API bindings Database interfaces feldera-samplyEnhance profiles produced using samply3,622MIT OR Apache-2.0 Command line utilities Development tools::Profiling feldera-size-ofA crate for measuring the total memory usage of an object98,206MIT OR Apache-2.0 Development tools Development tools::Debugging feldera-sqllibSQL runtime library for Feldera51,193MIT OR Apache-2.0 API bindings Database interfaces feldera-storageStorage crate for feldera49,643MIT OR Apache-2.0 feldera-typesPublic API types for Feldera110,490MIT OR Apache-2.0 API bindings Database interfaces feldera_rust_decimalDecimal number implementation written in pure Rust suitable for financial and fixed-precision calculations.79,659MIT Data structures Mathematics feldsparNothing Yet2,928AGPL-3.0 WITH eCos-exception-2.0 feldsparsSafe and fast process mining library.1,656GPL-3.0-or-later felfelA Rust library and CLI tool for Farsi compound noun generation.3,313MIT felgensBilibili live danmu websocket library6,436MIT feliciaservice for accessing and sharing lists of bad actors9,790AGPL-3.0 felisReserved for upcoming project.766AGPL-3.0-only felixtui file manager with vim-like key mapping108,355MIT Command line utilities Filesystem felixs-tower-lspLanguage Server Protocol implementation based on Tower1,574MIT OR Apache-2.0 Asynchronous fellhorn-llama-cpp-2llama.cpp bindings for Rust581MIT OR Apache-2.0 fellhorn-llama-cpp-sys-2Low Level Bindings to llama.cpp758MIT OR Apache-2.0 felloeInteractive helm version management3,140Apache-2.0 OR MIT Command line utilities fellowshipA CLI to automate work around Polkadot collective work reports.1,666GPL-3.0-only feltDefines command aliases and executes them.4,440Zlib Command line utilities felt-platformPlatform abstraction for Felt UI (winit glue, IME, clipboard, dialogs)176MIT OR Apache-2.0 felt-uiA cross-platform GPU-accelerated UI framework for 2D and 3D86MIT OR Apache-2.0 feludaA CLI tool to check dependency licenses.14,045MIT Command line utilities Development tools felumentsA convenience macro for Rust builders17CC0-1.0 Rust patterns felysThe Felys Programming Language11,043MIT fem-cliA command line utility to run english as shell scripts via an LLM1,513MIT Command line utilities fem-cuda-solverA CUDA-based state space model for the GMT FEM1,330MIT Science Simulation fem-macrosProcedural macros to build the Giant Magellan Telescope FEM inputs/outputs17,572MIT Science Simulation fem_2d2D Finite Element Method Toolkit5,793MIT femaker简单优雅的前端脚手架4,269MIT femarkA Markdown to HTML converter and code syntax highlighter using pulldown-cmark and treesitter.11,435MIT OR Apache-2.0 Web programming::HTTP server femindPluggable, feature-gated memory engine for AI agent applications27MIT OR Apache-2.0 Database interfaces Text processing femlol-aws-credsTiny Rust library for working with Amazon IAM credential,s, supports `s3` crate23,000MIT femmeNot just a pretty (inter)face: pretty-printer and ndjson logger for log crate.6,761,192MIT OR Apache-2.0 femto-dialogDialog text box rendering for visual novels on femto-g165MIT OR Apache-2.0 femto-feedA feed reader so tiny it wont do much things.3,307MIT femto-formattingA simple renderer for formatted text using pukram for femto-g10,626MIT OR Apache-2.0 femto-gGPU-accelerated vector drawing library with dimension-generic paths337MIT OR Apache-2.0 Graphics femto-gptMinimal Rust library for training GPT language-models2,965MIT femto-meshA flexible mesh struct renderable using femto-g4,207MIT OR Apache-2.0 femtoclawFemtoClaw — Industrial Agent Runtime: a lightweight, production-grade Rust AI agent runtime.198Apache-2.0 Command line utilities femtoclaw-auditFemtoClaw Observability — telemetry, logging, metrics, and audit trail231Apache-2.0 femtoclaw-benchFemtoClaw Benchmark Suite — industrial runtime performance, latency, throughput, and memory benchmarks.45Apache-2.0 femtoclaw-clawsFemtoClaw Capability Modules and Tool Integration Core Library169Apache-2.0 femtoclaw-cliFemtoClaw Command-Line Interface41Apache-2.0 femtoclaw-complianceFemtoClaw Reference Compliance Test Harness23Apache-2.0 femtoclaw-policyFemtoClaw Policy Engine — capability gating and authorization enforcement231Apache-2.0 femtoclaw-protocolFemtoClaw Protocol Validation — strict JSON schema validation for runtime messages233Apache-2.0 femtoclaw-registryFemtoClaw Talon Registry - Publish, discover, and manage Talons (agent capabilities)23Apache-2.0 Command line utilities femtoclaw-remoteFemtoClaw Remote Protocol — API server, event handlers, and WebSocket support43Apache-2.0 femtoclaw-runtimeFemtoClaw — Industrial Agent Runtime: a lightweight, production-grade Rust AI agent runtime.57Apache-2.0 Command line utilities femtoclaw-sdkFemtoClaw Client SDK — programmatic API bindings for external integration43Apache-2.0 femtoclaw-storageFemtoClaw Storage — persistence, state snapshots, and execution history205Apache-2.0 femtoclaw-wasmFemtoClaw WASM Runtime — WebAssembly sandbox execution for isolated capability execution23Apache-2.0 femtoclaw_rsLightweight Rust CLI agent for LLMs with ntfy pub/sub gateway support27MIT Command line utilities femtofemmefemme rewritten on env_logger2,945MIT femtoflatbuffersTiny no_std, allocation-optional FlatBuffers encoder/decoder driven by derive macros instead of a schema compiler20MIT OR Apache-2.0 Embedded development Encoding femtoflatbuffers-deriveDerive macros (Table, Union) for the femtoflatbuffers crate38MIT OR Apache-2.0 femtofontA simple no_std font parser and rasterizer.34MIT OR Apache-2.0 OR Zlib GUI No standard library femtopbA no-std, no-alloc set of tools for protobuf encoding and decoding65,522Apache-2.0 Embedded development Encoding femtopb-buildA code generator for `femtopb`65,099Apache-2.0 Embedded development Encoding femtopb-deriveDerive macros for `femtopb` traits65,966Apache-2.0 Embedded development Encoding femtorandHigh performance, no-std random number generation on a tiny footprint.56MIT OR Apache-2.0 Algorithms No standard library femtorinth(Unmaintained) Femtorinth is a library to interact with a sub-set of the Modrinth API.6,150MPL-2.0 femtosa femtosecond-based representation of time, duration, and frequency, for the purpose of simulation3,434MIT OR Apache-2.0 Date and time Emulators femtovgAntialiased 2D vector drawing library2,214,795MIT OR Apache-2.0 Graphics fenA Forsyth-Edwards notation parser with proper error handling.6,919 fen-rsForsyth-Edwards Notation parser7,602MIT Games Parser implementations fen4A parser and writer for the fen4 file format used by Chess.com for 4 player chess games10,385MIT fen_cliThe command line interface for Fen5,430MIT Command line utilities Development tools::FFI fen_parserA parser for Fen4,452MIT Development tools::FFI Parser implementations fencfenc4,607MIT fenc_clifenc_cli1,876MIT fenceA rate limiter for threaded programs.4,974MIT/Apache-2.0 fencecatWalkdir cat with markdown fenced code output1,262MIT Command line utilities Development tools fencelineZero-day security scanner for Python codebases, in Rust67MIT Command line utilities Development tools fencerA mini CLI tool to scan creds and secrets in source code4,063MIT Command line utilities fencryptionA program to encrypt/decrypt text, files and directories8,466MIT fency-pgnA converter from Standard Algebraic Notation (SAN) moves to the resulting State of a Game.7,909MIT fendArbitrary-precision unit-aware calculator101,331MIT Command line utilities Mathematics fend-coreArbitrary-precision unit-aware calculator130,853MIT Command line utilities Mathematics fenestraA pure-Rust native GUI framework with web-grade aesthetics: OKLCH themes, soft shadows, flexbox/grid, and headless PNG rendering713MIT OR Apache-2.0 GUI fenestra-animFrame-pure keyframe animation math: typed tracks, CSS cubic-bezier and closed-form spring easing, and an exact rational timebase…187MIT OR Apache-2.0 Mathematics fenestra-cefCEF (Chromium Embedded Framework) backend for Fenestra cross-platform webview windows26MIT OR Apache-2.0 GUI Rendering fenestra-chartsSparklines, line charts, and bar charts for the fenestra GUI framework — the reference third-party widget crate558MIT OR Apache-2.0 GUI fenestra-cliFenestra CLI: runtime install, app templates, source installs, and bundle staging18MIT OR Apache-2.0 Command line utilities Development tools fenestra-coreElement IR, theme tokens, style resolution, layout, text, and scene building for the fenestra GUI framework1,573MIT OR Apache-2.0 GUI fenestra-describeSerialized UI for the fenestra GUI framework: parse JSON to a renderable, verifiable tree335MIT OR Apache-2.0 GUI fenestra-kitDesign-system widget kit for the fenestra GUI framework1,031MIT OR Apache-2.0 GUI fenestra-looksExpert-crafted design languages for the fenestra GUI framework — complete looks with themes and typefaces, applied in one call542MIT OR Apache-2.0 GUI fenestra-markdownA markdown widget for the fenestra GUI framework — CommonMark rendered as native elements547MIT OR Apache-2.0 GUI fenestra-mcpModel Context Protocol server exposing the fenestra GUI framework to AI agents213MIT OR Apache-2.0 GUI fenestra-motionDeclarative motion graphics for the fenestra GUI framework: compositions as pure functions of frame number, sampled and verified…16MIT OR Apache-2.0 GUI fenestra-platformWindow, shell, region, and desktop integration primitives for Fenestra16MIT OR Apache-2.0 GUI Operating systems fenestra-renderCommand-line renderer and verification harness for the fenestra GUI framework265MIT OR Apache-2.0 GUI fenestra-runtimeShared web runtime detection, installation, validation, and pruning for Fenestra (Chromium Embedded Framework)45MIT OR Apache-2.0 GUI Web programming fenestra-shellWindowed (winit + wgpu) and headless runners for the fenestra GUI framework1,112MIT OR Apache-2.0 GUI fenestrojEasier wrappers for Win32 API stuff, safe when possible18,962Zlib API bindings No standard library fenetrePure Rust-based GUI library1,230Apache-2.0 fenexA rust library for parsing and handling FEN and algebraic chess notations.8,160MIT fengbofengbo497MIT fenictest concurrent code1,574MIT fenirTools for CVE managing, exploring and collect some data about their weaknesses and classifications14,429MIT Command line utilities Security fenixFenix.1,694BSD-3-Clause fenix-runtimeWebView2 Fixed Version Runtime auto-downloader for Ultron Framework.24MIT fennRun a command with secrets fetched just-in-time, injected leak-tight, and gone on exit.30Apache-2.0 Command line utilities Development tools fennecFennec Programming Language10,000MPL-2.0 fennec-commonFennec Programming Language5,834MPL-2.0 fennec-coreFennec Programming Language5,693MPL-2.0 fennec-modbusModular Modbus client implementation1,337MIT fennec-parserFennec Programming Language8,851MPL-2.0 fennec-serverFennec Programming Language4,414MPL-2.0 fennec-vfsFennec Programming Language3,344MPL-2.0 fennelFennel415MIT OR Apache-2.0 fennel-commonCommon package of Fennel game engine providing shared types294MIT fennel-coreCore package of Fennel game engine providing rendering and audio1,282MIT fennel-engineMain package of Fennel game engine providing higher level API3,152MIT fennel-gpuThis crate provided low-level graphics functionality for the Fennel game engine.49MIT fennel-physicsPhysics engine for the Fennel game engine37MIT fennel-pluginsCrate defining plugin trait for the Fennel engine39MIT fennyA library for working with Fenwick trees4,091BSD-2-Clause Data structures fenpixFenpix is a Rust library that converts FEN strings into pixel chess boards.19,897MIT fenrirLocates wifi devices using services such as wigle.net3,008MIT OR Apache-2.0 Authentication fenrir-rsFenrir is a create for using logi for log aggregation which can be used with a logging framework like fern.10,142MIT Development tools::Debugging fenrisA library for advanced finite element computations in Rust43,178MIT OR Apache-2.0 Science fenris-geometryGeometry functionality for fenris10,868MIT OR Apache-2.0 fenris-nested-vecA data structure used by fenris6,220MIT OR Apache-2.0 fenris-optimizeOptimization functionality used by fenris6,995MIT OR Apache-2.0 fenris-paradisParallel processing of disjoint indices for the fenris library7,302MIT OR Apache-2.0 fenris-quadratureQuadrature rules for finite element applications8,798MIT OR Apache-2.0 fenris-solidSolid mechanics functionality for fenris38,850MIT OR Apache-2.0 fenris-sparseSparse matrix functionality for fenris9,097MIT OR Apache-2.0 fenris-traitsCore traits used by fenris7,205MIT OR Apache-2.0 fenrixMain entry point for Fenrix: A modern Rust UI framework for building fast, reliable, and beautiful web apps.293MIT fenrix-cliCommand Line Interface for Ferix: A modern Rust UI framework for building fast, reliable, and beautiful web apps.289MIT fenrix-coreA modern Rust UI framework for building fast, reliable, and beautiful web apps.889MIT GUI Web programming fenrix-domServer-side runner for the Fenrix framework, handling API endpoints and static file serving.452MIT fenrix-macrosMacros for Ferix: A modern Rust UI framework for building fast, reliable, and beautiful web apps.459MIT fenrix-routerRouter for Ferix: A modern Rust UI framework for building fast, reliable, and beautiful web apps.459MIT fenrix-serverServer-side runner for the Fenrix framework, handling API endpoints and static file serving.289MIT GUI Web programming fensoAn architecture linter for Python: enforces module boundaries and dependency rules. Early development.15MIT Development tools fensterSimple sliding window implementation8,098Apache-2.0 fenster-rsRust bindings to zserge/fenster25MIT GUI fenster-sysRust raw bindings to zserge/fenster82MIT GUI fensuAn architecture linter for Python: enforces module boundaries and dependency rules. Early development.15MIT Development tools fensu-cliReserved package name for the Fensu native CLI15Apache-2.0 Command line utilities Development tools fentext-uitext ui and input for games or realtime text applications538MIT fentrailCLI to build and query a KV-store of position and openings1,524AGPL-3.0-or-later Command line utilities fenvnew env command with dotenv1,640GPL-2.0-or-later Command line utilities fenv-binda safe wrapper around fenv.h5,109non-standard fenwickFenwick tree: data structure that efficiently calculates prefix sums in a changing array of numbers.178,514MIT Algorithms Data structures fenwick-bit-treeSlighly over-engineered FenwickTree implmentation.7,469MIT OR Apache-2.0 fenwick-modelfenwick-tree-based test utils for the 'arithmetic-coding' crate1,588MIT Compression Encoding fenwick-treeAn implementation of a binary indexed tree (Fenwick tree) data structure in Rust.5,348MIT Data structures fenwick-tree-rsFenwick/BIT tree, 2D BIT, range updates, prefix sums19MIT Algorithms Data structures fenxA rust library for parsing and handling FEN and algebraic chess notations.2,848MIT OR Apache-2.0 feoSimple system monitoring CLI tool for Linux, with GPU temperature monitor for Raspberry Pi8,486MIT OR Apache-2.0 Visualization feo-mathMath library for 3D transformation.3,135MIT Cryptography Data structures