All 305,250 crates, alphabetically

uselesskey-core-base62Base62 generation primitives for uselesskey fixture crates.605MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-cacheIdentity-keyed typed cache primitives for uselesskey fixture factories.123,304MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-factoryFactory orchestration and cache lookup behavior for uselesskey fixtures.123,259MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-hashLength-prefixed hashing helpers shared by deterministic fixture derivation paths.123,564MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-hmac-specHMAC algorithm spec model shared across uselesskey hmac-related crates.115,433MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-idCore identity and derivation primitives for uselesskey.123,440MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-jwkDeprecated compatibility shim for JWK/JWKS models; prefer uselesskey-jwk.1,208MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-jwk-builderDeprecated compatibility shim for JWKS builder; prefer uselesskey-jwk.1,249MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-jwk-shapeDeprecated compatibility shim for JWK/JWKS shapes; prefer uselesskey-jwk.1,315MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-jwks-orderDeprecated compatibility shim for JWKS ordering; prefer uselesskey-jwk.1,287MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-keypairShared PKCS#8/SPKI key-material helpers for uselesskey fixture crates.164MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-keypair-materialPKCS#8/SPKI key-material helpers shared by key fixture crates.13,114MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-kidDeprecated compatibility shim for deterministic kid helpers; prefer uselesskey-jwk.123,134MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-negativeCompatibility facade for negative fixture builders used by uselesskey.123,297MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-negative-derDER-focused negative fixture builders for deterministic corruption in uselesskey.123,313MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-negative-pemPEM-focused negative fixture corruption helpers for test fixtures.123,311MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-rustls-pkirustls-pki-types adapters for uselesskey fixture crates.277MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-seedSeed parsing and redaction primitives for uselesskey.123,642MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-sinkTempfile-backed artifact sinks used by uselesskey.123,274MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-tokenDeterministic token-shape generation helpers shared by uselesskey fixture crates.519MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-token-shapeToken shape generation primitives shared across uselesskey token crates.560MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-x509Deterministic X.509 policy helpers shared by uselesskey fixture crates.1,111MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-x509-chain-negativeX.509 chain negative-fixture policy helpers for uselesskey.1,215MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-x509-deriveDeterministic X.509 derivation helpers for uselesskey fixture crates.1,146MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-x509-negativeX.509 negative-fixture policy helpers for uselesskey.1,148MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-core-x509-specX.509 fixture spec models and stable encoders for uselesskey.1,275MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-ecdsaECDSA P-256/P-384 key fixtures (PKCS#8/SPKI, PEM/DER) for tests.1,117MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-ed25519Ed25519 key fixtures (PKCS#8/SPKI, PEM/DER) with deterministic generation.1,752MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-entropyDeterministic high-entropy byte fixtures for tests.185MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-hmacHMAC HS256/HS384/HS512 secret fixtures for deterministic and random tests.115,630MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-jose-openidJOSE/OpenID focused conversion helpers for uselesskey fixtures.89MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-jsonwebtokenjsonwebtoken adapter traits for uselesskey fixtures (EncodingKey/DecodingKey).114,999MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-jwkTyped JWK/JWKS models, builders, ordering, and negative fixtures.1,734MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-pgpOpenPGP key fixtures (armored and binary) for deterministic and random tests.385MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-pgp-nativeNative OpenPGP key type adapters for uselesskey fixtures.90MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-pkcs11-mockDeterministic PKCS#11-like mock fixtures for hardware-adjacent tests.127MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-ringring 0.17 adapter traits for uselesskey RSA/ECDSA/Ed25519 fixtures.222MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-rsaRSA key fixtures (PKCS#8/SPKI, PEM/DER) with negative variants for tests.12,802MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-rustcryptoRustCrypto adapter traits for uselesskey RSA/ECDSA/Ed25519/HMAC fixtures.230MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-rustlsrustls-pki-types and rustls config adapters for uselesskey X.509/key fixtures.325MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-sshDeterministic OpenSSH key and certificate fixtures for infra and deployment tests.191MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-test-serverDeterministic OIDC discovery + JWKS HTTP test fixture server for uselesskey.119MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-tokenAPI key, bearer, and OAuth access-token fixture generator for tests.794MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-token-specStable token fixture specification shared across token generators.602MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-tonictonic transport TLS adapters for uselesskey X.509 certificate fixtures.225MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-webauthnDeterministic WebAuthn ceremony fixtures for tests.129MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-webhookDeterministic webhook fixtures for GitHub, Stripe, and Slack signature tests.236MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselesskey-x509X.509 self-signed and chain certificate fixtures with negative variants for tests.1,532MIT OR Apache-2.0CryptographyDevelopment tools::Testing uselog-rsuse log for outputing log in test and not test mode with one line code4,673Apache-2.0 usenet-dlHighly configurable Usenet download manager library184MIT OR Apache-2.0Network programmingWeb programming usenet_rebornTerminal-based Usenet NNTP client written in Rust with ratatui/crossterm.1,526GPL-3.0-or-laterCommand line utilitiesNetwork programming usenetnews-dynexp2USENET news server expiry time dynamic tuning (for INN2)2,638GPL-3.0-or-later usepod-agentUse Pod marketplace provider agent — connects local inference backends (vLLM, llama.cpp, LM Studio, Ollama) to the Use Pod…92Apache-2.0Command line utilitiesWeb programming userPortably retrieve the user name (and possibly other information in future versions) of the user running the current thread.9,339MIT/Apache-2.0 user-a-sys-test-haoboTest1,431MIT OR Apache-2.0 user-acpidnon-root companion process for linux acpid ( https://sourceforge.net/projects/acpid2/ )1,601GPL-3.0-onlyCommand line utilitiesHardware support user-agent-parserA parser to get the product, OS, device, cpu, and engine information from a user agent, inspired by…145,635MITParser implementations user-b-sys-test-haoboTest417MIT OR Apache-2.0 user-backtraceA very small library for smaller backtraces that only contain user relevant information6,059MIT user-balance-merkle-treeA simple Merkle tree implementation in Rust for user/balance storage.2,251MITCryptographyData structures user-errorUserFacingError is an error crate that allows you to pretty print your errors and error chain for consumption by the end user. If…85,559non-standardCommand-line interfaceData structures user-idleGet a users idle time.66,979MIT OR Apache-2.0 user-idle-timeGet a user's idle time.1,470MIT OR Apache-2.0Date and time user-idle2Get a user's idle time.2,998MIT OR Apache-2.0 user-idle3Get a user's idle time.249MIT OR Apache-2.0 user-mode-riscvRISCV CPU emulation focusing on user mode instructions only1,895non-standardGraphicsMultimedia user-notifyShow desktop notifications to end users on linux, macOS and windows.3,440LGPL-3.0-or-later user-notify-rebornSend notifications to the system notification center, works on Windows and macOS492MIT OR Apache-2.0API bindingsGUI user-panicRust Library Crate for Helpful Error messages1,614MIT user-permissionAsync user / group management — axum REST API + WebUI library and a ready-to-run server binary296MIT OR Apache-2.0AuthenticationCommand line utilities user-permission-coreAsync user / group / permission core (SQLite backend, Argon2, JWT, optional HTTP relay)381MIT OR Apache-2.0AuthenticationDatabase interfaces user-serviceA user management microservice.3,047Apache-2.0 user-startupSimple cross-platform tool to make your command auto run on startup2,816MITCommand line utilities user-switchSwitch user and group on UNIX systems1,334 AGPL-3.0-only user-syncuser-space synchronization3,163MIT OR Apache-2.0 user-validatorA a crate for parsing and validating user sessions for my website2,329MIT user32-sysContains function definitions for the Windows API library user32. See winapi for types and constants.1,539,480MIT user_user_816MulanPSL-2.0 user_agentProvides the concept of a user agent session, storing and retrieving cookies over multiple HTTP requests (a `Session`).28,766MIT/Apache-2.0 user_dirsA respectful, XDG-first user directories implementation for obtaining the home, cache, config, data, runtime, and state…8,275MIT user_docAttribute and derive procedural macros for generating user-facing documentation.5,888Apache-2.0 OR MITDevelopment tools user_doc-doc_dataMetadata describing user-facing documentation.9,558Apache-2.0 OR MITDevelopment tools user_doc-doc_proc_macroAttribute and derive procedural macros for generating user-facing documentation.6,647Apache-2.0 OR MITDevelopment tools user_doc-testsTests for user_doc.5,008Apache-2.0 OR MITDevelopment tools user_info_middlewareCustom extractor for Rust Axum to extract the version from an HTTP header X-Endpoint-API-UserInfo.647non-standardWeb programming user_inputUser Input Made Simple4,959MIT user_input_macrosSimple Rust input macros for reading single and multiple values27MIT user_input_with_autocompleteThe only purpose of this crate is to provide easy functionality to accept input from user, with an optional support for…2,771MIT user_lookupA library to lookup user and groups on Unix/Linux3,533MIT/Apache-2.0 user_of_that_apitesting how package renaming works across different registries1,543MIT user_queryQuery the user for input on stdin.1,987MIT user_stable_vtableA partial implementation of [RFC 2955], written in stable rust.5,351MIT OR Apache-2.0 user_traitA library for user authentication abstraction in Rust.2,257MIT OR Apache-2.0AuthenticationData structures user_utilsUtility library for accessing system users and groups4,165MIT OR Apache-2.0Operating systems user_wangwu_kevinUser management1,197Apache-2.0 useract-forensicUser-activity correlation layer — merges shell-history and peripheral-device events into one per-user timeline and emits…898Apache-2.0Command line utilitiesParser implementations useragent-coinpaymentRFC17 CoinPayment host runtime for user-agent owned purses, receivables, cheques, invoices, and clearing state2,165AGPL-3.0 userassist-corePure-Rust read-only Windows UserAssist reader — decodes the per-user GUI execution-evidence entries (ROT13-encoded program path,…20Apache-2.0Parser implementations userassist-forensicWindows UserAssist forensic analyzer — reports per-user GUI program launches (path, run count, last-execution time) with graded…18Apache-2.0Command line utilitiesParser implementations userboundkey-kcmInternal bindings and helpers for Windows KCM User-Bound Key APIs135MITOperating systems usercheckRust client for the UserCheck API2,234MIT userdA user daemon, managing services and regular running of jobs, in user space.743MIT userdata3data types for (de)serializing user settings from userdata3.json files3,544MIT userdmpA library in Rust for parsing Minidump (.dmp) files generated in user mode on Windows2,806MITFilesystemOperating systems userenv-sysContains function definitions for the Windows API library userenv. See winapi for types and constants.385,043MIT usereport-rsCollect system information for the first 60 seconds of a performance analysis7,785MITCommand line utilities userfaultfdRust bindings for the Linux userfaultfd functionality2,812,921MIT OR Apache-2.0 userfaultfd-sysLow-level bindings for userfaultfd functionality on Linux.2,668,486MIT OR Apache-2.0 userinputlibrary for checking userinput errors7,951MIT OR Apache-2.0 userkitA unified cross-platform CLI tool for user management, providing consistent interface for user operations1,448MITCommand line utilitiesOperating systems userlandHelper tool for IPS package development2,403non-standard userland-execveAn implementation of execve() in user space9,295MIT userland-ioIt's like FUSE but for the block layer5,227MITFilesystem userman-authUser Manager1,522MIT usermodeCervus usermode API library1,895MIT usernamePortably retrieve the user name (and possibly other information in future versions) of the user running the current thread.416,581MIT/Apache-2.0 username-blocklistAn opinionated blacklist of words that you might not like to see used as usernames in your service2,657MIT usernotifications-rsSafe Rust bindings for Apple's UserNotifications and UserNotificationsUI frameworks on macOS141MIT OR Apache-2.0API bindingsOperating systems::macOS APIs userpromptA crate that helps gather input from a user6,735GPL-3.0 userprompt_deriveThe derive library for the userprompt crate. Derives prompt traits4,219GPL-3.0 userrorUser-facing error messages for command-line programs.5,461 usersLibrary for accessing Unix users and groups17,688,935MIT users_nativeCrate for obtaining user information on a system2,959GPL-3.0 userscriptuserscript839MIT userspaceuserspace library3,792non-standardNo standard libraryOperating systems userspace-pagefaultManage user-allocated virtual memory by handling page faults in user space on *nix platforms.6,150Apache-2.0 userspace-rngprovides secure randomness with entropy generated in userspace13,975MIT userspace_builduserspace_build library2,185non-standardNo standard libraryOperating systems userspace_hubuserspace_hub library566non-standardNo standard libraryOperating systems userstylesAPI bindings for userstyles.org.10,402GPL-3.0API bindings usesendErgonomic Rust SDK for useSend — an open-source Resend alternative249MIT OR Apache-2.0API bindingsEmail usesend-apiLow-level typed API client for useSend — an open-source Resend alternative321MIT OR Apache-2.0API bindingsEmail usetAn implementation of a set and a map designed for speed, with unsigned integers as keys.1,829MITAlgorithmsData structures usfUniversal Storage Format (USF) - A next-generation, high-performance storage format1,089Apache-2.0CompressionDatabase interfaces usfmUnified Standard Format Markers (USFM) parser with zero-copy derserialization.2,165MIT usfm-grammarParse, validate and convert USFM Bible files to USX, USJ, table and BibleNLP formats, built on tree-sitter-usfm319MITEncodingParsing tools usfm3Error-tolerant USFM 3.x parser with USJ, USX, and USFM output460MITParser implementationsText processing usfullA lib testing1,633MIT OR Apache-2.0 usfxRealtime procedurally generated sound effects18,912AGPL-3.0-or-laterGame developmentMultimedia usg-dhcprotoA DHCP parser and encoder for DHCPv4/DHCPv6. `dhcproto` aims to be a functionally complete DHCP implementation.390MITEncodingNetwork programming usg-dhcproto-macrosA macro library for generating option types for dhcproto247MITEncodingNetwork programming usg-est-clientRFC 7030 compliant EST (Enrollment over Secure Transport) client35Apache-2.0CryptographyNetwork programming usg-fips-tlsA restricted, fail-closed FIPS 140-3 TLS 1.3 crypto core: a rustls aws-lc-rs provider locked to TLS 1.3, AES-256-GCM-SHA384, and…186MIT OR Apache-2.0CryptographyNetwork programming usgs-earthquake-apiA Rust client library for querying the USGS Earthquake API. Provides request validation, error handling, and data models for…288MITAPI bindingsScience usgs-eros-clientUSGS EROS M2M API client1,837MITAPI bindingsScience usgs-espa-clientAPI client for USGS ESPA API1,790MITAPI bindingsScience ushUltrasonic Shell - communicate between devices using ultrasonic sound waves427MITCommand line utilitiesMultimedia::Audio ushcnUS Historical Climatology Network data downloader5,068MIT OR Apache-2.0 ushellEmbedded shell over serial connection32,118MIT/Apache-2.0 ushell2Lightweight no_std shell runtime for interactive CLI applications45MITCommand line utilitiesDevelopment tools ushell_dispatcherProcedural macros for generating command and shortcut dispatchers45MITCommand line utilitiesDevelopment tools ushell_inputCore of the shell framework.155MITCommand line utilities usherParameterized routing for generic resources in Rust6,204MITAlgorithmsData structures ushiHigh-performance LLM inference server with llama.cpp FFI bindings769GPL-3.0-or-laterAPI bindingsScience ushiftMulti-platform data extraction tool with a single Rust script1,502MIT ushmaThermodynamics simulation — heat transfer, entropy, equations of state, thermal properties613GPL-3.0-onlyScienceSimulation usiA library to handle type-safe communication with USI-compatible shogi engines.15,696MITGame engines usi-runA command line utility for running games between USI compliant Shogi engines.19,927MITCommand line utilitiesGame engines usiagentUSIAgent is a framework for Shogi AI development that supports the usi protocol.16,198MIT usiem-basic-parseruSIEM parser component that allows using multiple and different parsers11,139MITParsing tools usiem-notionerSend Alerts to Notion. Library to be used to build a custom SIEM with the framework uSIEM2,737MIT usiem-utilsA framework for building custom SIEMs1,491MITParsing tools usigUnique Sequential Identifier Generator6,760MIT usineA framework for building event-driven systems.24MPL-2.0 usingA macro for simpler builders with method cascading2,526MITNo standard libraryRust patterns using-paramAdd parameters, generics and return types to all functions in the impl block1,233MITRust patterns using-queueSpecial queue-like data structure2,426GPL-3.0 usize-convInfallible integer conversions to and from usize and isize under explicit portability guarantees45MIT OR Apache-2.0No standard library usize-setSet data structures optimized to store sparsely distributed usize values59,498MITData structuresNo standard library usize_castCompile time checked cast from and to `usize`/`isize`213,720MIT OR Apache-2.0Hardware supportNo standard library usize_conversionsConversion traits for conversions between `usize` and fixed sized integers.464,051MIT/Apache-2.0 usizedInfallible conversions to and from usize1,155CC0-1.0 uslusl builds Universal Scalability Law models from sets of observed measurements.7,121MIT OR Apache-2.0 uslcShaders for Everyone832MIT OR Apache-2.0 uslegalprouslegalpro is a simple library to help with interacting with uslegalpro's JSON API via the reqwest crate.1,490MIT uslsA Rust library integrated with ONNXRuntime, providing a collection of ML models.32,696MIT usmeA lightweight symbolic math engine for differentiation and simplification.21MIT OR Apache-2.0MathematicsParser implementations usmuLibrary for controlling the *μSMU* small source-measure unit.814MIT OR Apache-2.0 usn-journal-rsA Rust library for working with the NTFS USN change journal and enumerating the MFT.10,642MITFilesystemOperating systems::Windows APIs usn-journal-watcherWatch a NTFS volume for any file operation.4,538MIT OR Apache-2.0Filesystem usn-parserA Windows utility for NTFS/ReFS to search the MFT & monitoring the changes of USN Journal.1,863MITDevelopment toolsFilesystem usnjrnlparses a $UsnJrnl file12,732non-standard usnjrnl-forensicNTFS USN Journal parser with full path reconstruction via journal rewind1,659Apache-2.0 usnrsA tool and library to parse USN Journal files2,961Apache-2.0Command line utilitiesParser implementations usos-rsCrate provides a convenient way to authenticate to USOS api1,527AGPL-3.0-or-laterAPI bindingsAuthentication uspUniversal Session Protocol. PATENT: 11,895,1983,001AGPL-3.0-only uspsImplementation of the USPS Postal Address standards1,528MIT OR Apache-2.0 usps-apiA wrapper around the USPS WebTools API1,831BSD-3-Clause uspto_xmlA library for downloading patent and application XML from the USPTO.75Apache-2.0API bindings usqlUniversal SQL Lexer and Parser1,609MIT/Apache-2.0 usql-coreuSQL core types and traits1,608Apache-2.0 usr_inputA simple macro to get user input in 1 line71MIT usrbioRust bindings for the [3FS USRBIO API](https://github.com/deepseek-ai/3FS/blob/main/src/lib/api/UsrbIo.md).11,733MIT OR Apache-2.0 usrsctp-sysBindings to the usrsctp library.3,570MITExternal FFI bindings usrvSimple, safe HTTP server829MIT OR Apache-2.0Web programming::HTTP server ussoThe usso provides a universal single sign-on (SSO) integration for microservices, making it easy to add secure, scalable…5,927MIT ussr-nbtA very fast and versatile NBT library for Minecraft: Java Edition.7,301MIT ustUniversal styling1,192MITCommand-line interfaceGame development ust1-commonShared constants and pure math for UST1 oracle and window contracts57MIT OR Apache-2.0 ust1-oracleOn-chain UST1 / vFDUSD rate oracle for Terra Classic (CosmWasm)35MIT OR Apache-2.0