CATEGORY

No standard library 11,888 crates

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.

llml_simdSIMD (Single Instruction Multiple Data) extension for a variety of targets9,294MIT Embedded development Hardware support sds011-rsA driver for the SDS011 particle sensor based on embedded-io.9,291MIT OR Apache-2.0 Embedded development Hardware support fixFixed-point number types9,277ISC Data structures No standard library name-itGive a name to async fn return types9,272BlueOak-1.0.0 OR Apache-2.0 Asynchronous No standard library transduceZero-copy isomorphic parsing: your code should look like what it parses.9,242MPL-2.0 Compilers Encoding entro-hashEntro Hash is a 32-bit, non-cryptographic hashing algorithm.9,231MIT-0 Algorithms Embedded development rwasmZK-friendly WebAssembly runtime optimized for blockchain and zero-knowledge applications9,231Apache-2.0 No standard library Virtualization hpke_pqFork of hpke that adds PQ modes9,226MIT/Apache-2.0 Cryptography No standard library codecCodec trait to assist in making codecs9,226MIT Multimedia::Encoding No standard library ch32-metapacPeripheral Access Crate (PAC) for all WCH's MCU chips, including metadata.9,221MIT OR Apache-2.0 Embedded development Hardware support objrsObjective-Rust: the unholy union of Rust and Objective-C.9,217Apache-2.0 OR MIT OR MPL-2.0 API bindings Development tools::FFI tinygifNo-std, high memory footprint GIF image loader9,212MIT/Apache-2.0 Embedded development Multimedia::Images chrono-lightLight DateTime/scheduler library for Rust, no_std compatible9,203MIT OR Apache-2.0 Date and time No standard library sifive-test-deviceProvide definition of SiFive test device.9,193MulanPSL-2.0 OR MIT Embedded development Hardware support core-mathRusty API for CORE-MATH9,191MIT Mathematics No standard library dashmap-shardA Rust port of Google's SwissTable hash map9,183Apache-2.0/MIT Data structures No standard library sha3-kmacKMAC per NIST SP 800-1859,183BSD-3-Clause Cryptography No standard library ring-fork-dtoolExtended ring lib by dtool9,181non-standard Cryptography No standard library hc-wasmer-typesWasmer Common Types9,177MIT OR Apache-2.0 WITH LLVM-exception Data structures No standard library libmctplibMCTP is a MCTP (Management Component Transport Protocol) implementation for Rust9,174MIT OR Apache-2.0 Embedded development Encoding libafl_coreA platform-independent shared memory library for Rust9,171MIT OR Apache-2.0 Embedded development No standard library alloc_cata simple allocator for small-to-tiny Wasm projects in rust9,170non-standard Memory management No standard library rdf-store-sqliteA SQLite storage adapter for RDF.rs knowledge graphs.9,167Unlicense Data structures No standard library egglangThe Egg Programming Language From Eloquent JavaScript, but in Rust9,141MIT Compilers No standard library rjshipA collection of tools for working with the JSend specification, written in Rust.9,134BSD-3-Clause Encoding No standard library debounced-pinA platform-agnostic debounce library. It also adds a wrapper for an `InputPin` that debounces it's `is_high()` and `is_low()`…9,134MIT OR Apache-2.0 Embedded development No standard library sidhAn efficient supersingular isogeny-based cryptography library.9,134MIT Cryptography No standard library embedded-devicesDevice driver implementations for many embedded sensors and devices9,134MIT OR Apache-2.0 Asynchronous Embedded development enc28j60A platform agnostic driver to interface the ENC28J60 (Ethernet controller)9,132MIT OR Apache-2.0 Embedded development Hardware support minireqLightweight support for MQTT-based request/response handling interfaces9,132MIT Configuration Embedded development stepperUniversal Stepper Motor Interface9,1300BSD Embedded development Hardware support lpc176x-5xRegister mappings for the NXP LPC176x-5x family of ARM Cortex-M3 microcontrollers9,127WTFPL Embedded development Hardware support axdriver_inputCommon traits and types for input device drivers9,116GPL-3.0-or-later OR Apache-2.0 OR MulanPSL-2.0 Hardware support No standard library try_encoding_fromA convenient API for serde_json, serde_yaml, serde_cbor. Meme of the TryFrom and TryInto traits.9,114MIT OR Apache-2.0 Encoding No standard library roeUnicode case conversion9,111MIT AND Unicode-3.0 Encoding Internationalization (i18n) rust-elgamalA straightforward implementation of ElGamal homomorphic encryption using the ristretto255 elliptic curve group.9,101Apache-2.0 Cryptography No standard library hv-elasticSafe and almost-safe abstractions for lengthening lifetimes and `'static` "loaning" of non-`'static` types9,101MIT OR Apache-2.0 Concurrency Data structures matteMinimalist and allocation free GUI Layout9,092MIT No standard library fmul-to-intFloat multiplication to integer part.9,090MIT/Apache-2.0 Algorithms Mathematics oled_asyncDriver for various OLED display controllers. e.g. SH110x SSD130X works with embedded-graphics9,090MIT OR Apache-2.0 Embedded development No standard library zkp-primefieldA 251-bit prime field suitable for FFTs.9,074Apache-2.0 Algorithms Cryptography byte_setEfficient sets of bytes.9,061MIT OR Apache-2.0 Data structures Embedded development radixalDigits iteration for unsigned integer types.9,057MIT Algorithms Data structures tmclTrinamic Motion Control Language9,055Apache-2.0/MIT Embedded development Hardware support nostdMissing std types for no_std development9,052MIT OR Apache-2.0 No standard library discard-whileGet the first non-matching element, and the amount of discarded elements.9,050MIT No standard library No standard library::No dynamic allocation ironfish-reddsaA standalone implementation of the RedDSA signature scheme.9,050MIT OR Apache-2.0 Cryptography No standard library rav1d-disjoint-mutA provably safe abstraction for concurrent disjoint mutable access to contiguous storage9,047BSD-2-Clause OR MIT OR Apache-2.0 Concurrency Data structures ep-systick`embedded-profiling` implementation using systick9,034MIT OR Apache-2.0 Development tools::Profiling Embedded development playdate-luaHigh-level Lua API built on-top of Playdate API9,029MIT OR Apache-2.0 API bindings Game development into-ownedThis crate has been merged into as-is crate and is no longer developed by the current author.9,028MIT OR Apache-2.0 No standard library Rust patterns panic-extExtension library to panic facilities to make it more usable9,016BSL-1.0 No standard library wio_lite_mg126Board Support crate for the Wio Lite MG1269,012MIT OR Apache-2.0 Embedded development Hardware support stlogUltra lightweight logging framework for resource constrained devices9,007MIT OR Apache-2.0 Development tools::Debugging Embedded development manulGeneric library for round-based protocols9,006AGPL-3.0-or-later Cryptography No standard library sen0177Read air quality data from the SEN0177 and PMSA003I sensors9,005Apache-2.0 Embedded development Hardware support si5351A platform agnostic driver for the Si5351 clock generator9,003MIT OR Apache-2.0 Embedded development No standard library psp2-sysUnsafe Rust FFI bindings to the psp2 headers9,000MIT External FFI bindings Hardware support mayberA zero-cost enum for handling either references or owned values with a unified interface8,998MIT OR Apache-2.0 Data structures No standard library chibihashRust implementation of the ChibiHash hash function8,998MIT Algorithms No standard library lsxA pure, safe Rust implementation of the Twofish block cipher and the SHA-256 cryptographic hash function.8,983Zlib Cryptography No standard library va416xxPAC for the Vorago VA416xx family of MCUs8,983Apache-2.0 Embedded development Hardware support char-classesSimple matching of one char or byte, similar to regex8,978MIT No standard library No standard library::No dynamic allocation get_len_base_10_as_usizeTraits for getting length base 10 as usize, both at run and compile time8,971MIT OR Apache-2.0 Mathematics No standard library peterANSI terminal colours and styles for anything implementing `Display`8,963MIT OR Apache-2.0 Command-line interface No standard library dtb_parserno std but alloc depended device tree blob parsing lib8,957MIT Embedded development No standard library double-bufferA simple double buffer generic implementation8,947Unlicense Algorithms Data structures wasm4fun-corePrimitives and constants from WASM-4 fantasy console8,947ISC Game development No standard library sram23xPlatform-agnostic Rust driver for the 23xx series serial SPI SRAMs.8,947MIT Embedded development Hardware support lp50xxA simple platform agnostic library for the Texas Instruments LP50XX led driver8,947MIT Embedded development Hardware support acid22-adic double-precision floating-point implementation8,942MIT OR Apache-2.0 Mathematics No standard library singleton-traitSingleton trait for types with unique values and Erased type for zero-sized ownership proofs8,936MIT No standard library Rust patterns orderwalA generic-purpose, atomic, ordered, zero-copy read, zero-cost (in-place) write, Write-Ahead Log implementation for Rust.8,934MIT OR Apache-2.0 Data structures Database implementations secmem-allocCustom allocators for secret memory8,925MIT OR Apache-2.0 Cryptography Memory management atsam4sp32a-pacPeripheral access crate for the ATSAM4SP32A microcontroller8,912MIT OR Apache-2.0 Embedded development Hardware support core-futures-tlsA libcore wrapper allowing async/await to be used from no_std crates8,912Apache-2.0 OR MIT Asynchronous No standard library sgp40Rust driver for the Sensirion SGP40 gas sensor.8,905MIT OR Apache-2.0 Embedded development Hardware support zjsonParse JSON with zero allocation.8,901MIT OR Apache-2.0 Encoding No standard library stm32h743A peripheral API created (using svd2rust 0.13.0) for the STM32H743ZI8,900MIT OR Apache-2.0 Embedded development No standard library wasmer-compiler-xBase compiler abstraction for Wasmer WebAssembly runtime8,893MIT OR Apache-2.0 WITH LLVM-exception No standard library WebAssembly zc-deriveDerive macro for zc crate8,889MIT Data structures Memory management cbitmapA conventional, compact and core (no_std) bitmap.8,884MIT No standard library raw-sliceeGeneric low-level raw slice types8,882Apache-2.0 OR MIT Data structures Embedded development const-sub-arrayExtract a fixed size sub-array out of an array with complie-time length and offset checks.8,872MIT Data structures No standard library umm-mallocA global allocator implementation for embedded systems using the umm_malloc library.8,862MIT API bindings Embedded development sx1509A platform agnostic driver for the SX15098,858MIT OR Apache-2.0 Embedded development Hardware support umm-malloc-sysFFI bindings to the umm_malloc memory allocator.8,847MIT Embedded development External FFI bindings microuiMicroUI (immediate mode GUI) library in pure rust8,837BSD-3-Clause GUI No standard library digestibleA more dynamic Hash and Hasher trait for Rust8,836MIT OR Apache-2.0 Cryptography No standard library weak_trueSimilar to the automatic implicit conversion to boolean values in weakly typed languages8,826MIT No standard library No standard library::No dynamic allocation honeycombA portable parser combinator library that does not require a runtime8,819Apache-2.0 Algorithms Embedded development slotsFixed size data structure with constant-time operations8,817MIT Data structures No standard library closure-ffi-proc-macrosProc macros used and exported by the closure-ffi crate8,817MIT OR Apache-2.0 Development tools::FFI No standard library pair_macroCreate types consisting of the same type values such that Pair, Triplet, and so on.8,814MIT Data structures No standard library kiibohd-hall-effectAnalysis crate for intepreting hall-effect keyboard switches (e.g. Silo Switches)8,808MIT OR Apache-2.0 Embedded development Hardware support lock-free-staticLock-free static variables8,804MIT/Apache-2.0 Concurrency Data structures rdf-store-valkeyA Valkey storage adapter for RDF.rs knowledge graphs.8,801Unlicense Data structures No standard library max112xDriver for the 24-bit MAX11214 and similar ADCs.8,800MIT OR Apache-2.0 Embedded development Hardware support physical-quantitydimension and unit system for general physical physical quantities.8,791MIT OR Apache-2.0 No standard library Rust patterns eosio-chaineosio chain module that wrapping intrinsics eosio APIs8,791Apache-2.0 Embedded development No standard library owl_patchRust SDK for Rebel Technology Owl2/3 devices8,782MIT OR Apache-2.0 Embedded development Multimedia::Audio ls013b7dh03LS013B7DH03 Sharp LCD driver for embedded-hal8,780MIT OR Apache-2.0 Embedded development No standard library rsmonadHaskell-style monads for idiomatic Rust.8,779MPL-2.0 Compilers Data structures noproto-deriveDerive macros for the `noproto` crate. Do not use this crate directly.8,776MIT OR Apache-2.0 Embedded development Encoding funcmap_deriveDerivable functorial mappings for Rust8,773MIT OR Apache-2.0 Algorithms Data structures nist-pqc-seeded-rngImplementation of the RNG used to produce the KATs in NIST PQC competition8,769Apache-2.0 OR MIT Cryptography No standard library auto-delegate-macrosAuto delegate allows you that automatic impl of traits and delegate their handling to child members.8,764MIT OR Apache-2.0 No standard library lpc11xxRegister mappings for the NXP LPC111x/LPC11Cxx/LPC11xxL/LPC11xxXL family of Cortex-M0 microcontrollers8,757MIT Embedded development Hardware support staryA collection of modules that aim to feel like extensions of core, alloc, and std.8,7560BSD No standard library No standard library::No dynamic allocation gyuvl53l0xA rust driver for the VL53L0X (Time-of-Flight I2C laser-ranging module)8,754MIT Embedded development Hardware support ht32f523x2Peripheral access API for HT32F523x2 microcontrollers8,751GPL-3.0 Embedded development Hardware support uchanMulti-producer single-consumer channel for message passing8,745MIT Algorithms Concurrency frequency-unitA library for interacting with units of frequency.8,744MIT No standard library Value formatting const_cmpFor comparing types at compile-time8,740Zlib No standard library clerkA fully featured hardware agnostic HD44780 LCD controlling library.8,739MIT Embedded development No standard library fmtbufUtilities for formatting to a fixed-size buffer8,737Apache-2.0 Development tools::FFI No standard library phylacterySafe and thin wrappers around lifetime extension to allow non-static values to cross static boundaries.8,737MIT Concurrency Data structures wolf-crypto-sysLow-level bindings for wolfSSL's wolfcrypt8,735GPL-2.0-only Cryptography No standard library ternary-rsA Rust library for emulating the ternary operator from C/C++ (among other languages)8,733MIT OR Apache-2.0 No standard library Rust patterns afe4400An `embedded-hal` compatible driver for the TI AFE4400 pulse oximetry analog front-end chip.8,731MIT Embedded development No standard library canadensis_pnp_clientClient library for Cyphal plug-and-play node ID allocation8,728MIT OR Apache-2.0 Embedded development No standard library whatwg-infraTiny Rust-based implementation of the WHATWG Infra Standard8,717MIT OR Apache-2.0 No standard library Parsing tools stm32g4xx-halPeripheral access API for STM32G4 series microcontrollers8,711MIT/Apache-2.0 Embedded development Hardware support eeprom25aa02e48Platform-agnostic Rust driver for the 25AA02E48 EEPROM.8,703MIT Embedded development Hardware support crossbusA Platform-Less Runtime-Less Actor Computing Model8,696MIT Asynchronous Embedded development axplat-dynA dynamic platform module for ArceOS, providing runtime platform detection and configuration8,689Apache-2.0 No standard library Operating systems membankA pool of reusable memory to prevent unnecessary deallocations8,687MIT OR Apache-2.0 Memory management No standard library bq27xxxBQ27xxx (bq27426, bq27427) platform-agnostic driver8,674MIT Embedded development Hardware support rdif-timerDriver Interface of system timer.8,670MIT Embedded development No standard library biski64A fast, robust, 64-bit pseudo-random number generator with a guaranteed minimum period of 2^64.8,668MIT Algorithms No standard library si4703Platform-agnostic Rust driver for the Si4703 and Si4702 FM radio turners (receivers).8,659MIT OR Apache-2.0 Embedded development Hardware support selfieExperimental, macro-free and allocation-free self-referential structs.8,655MIT OR Apache-2.0 No standard library Rust patterns embassy-net-pppembassy-net driver for PPP over Serial8,649MIT OR Apache-2.0 Asynchronous Embedded development lilbigUtilities for swapping the byte-order of in-memory types.8,648MPL-2.0 No standard library No standard library::No dynamic allocation si7021-t-rhSi7021 driver (7013, 7020 and 7021)8,641MIT OR Apache-2.0 Embedded development No standard library baml-macrosDerive macros for BAML types8,631Apache-2.0 Development tools No standard library zeroableProvides a derive for `bytemuck::Zeroable`8,623MIT/Apache-2.0 No standard library hpm-metapacPeripheral Access Crate (PAC) for all HPM's MCU chips, including metadata.8,622MIT OR Apache-2.0 Embedded development Hardware support veml6070Platform-agnostic Rust driver for the VEML6070 UV light sensor.8,613MIT OR Apache-2.0 Embedded development Hardware support blinksyno-std, no-alloc LED control library designed for 1D, 2D, and 3D layouts8,610EUPL-1.2 Embedded development Hardware support constrained_intIntegers that are constrained within inclusive ranges.8,610MIT OR Apache-2.0 Algorithms Mathematics tea-softTEA block cipher8,609MIT OR Apache-2.0 Cryptography No standard library bl602-sdkRust Wrapper for BL602 IoT SDK8,606Apache-2.0 Embedded development No standard library columnsA text manipulation library for displaying separate text in columns.8,605MIT No standard library earclipTriangle mesh designed to be fast, efficient, and sphere capable.8,605MIT Algorithms No standard library kiibohd-keyscanningKiibohd gpio keyscanning module for momentary push button switches (keyboards)8,602MIT OR Apache-2.0 Embedded development Hardware support noizA simple, configurable, blazingly fast noise library built for and with Bevy.8,598MIT OR Apache-2.0 Game development Graphics merkle-heaplessStatically-allocated Merkle Tree and Mountain Range8,597MIT OR Apache-2.0 Algorithms Data structures lpc43xxRegister definitions for the NXP LPC43xx microcontroller platform, generated through svd2rust8,596Apache-2.0 Embedded development Hardware support ssd1306-i2cSSD1306 I2C driver8,583MIT OR Apache-2.0 Embedded development No standard library ellie_engineWhy ellie? Ellie is a type-safe programing language that runs on embedded and sandboxed environments.8,581non-standard Compilers Embedded development canadensis_bxcanBridge between Canadensis and the BXCAN peripherals found in some microcontrollers8,581MIT OR Apache-2.0 Embedded development No standard library openzeppelin-cryptoCryptographic Utilities8,562MIT Algorithms Cryptography hc-wasmer-compilerBase compiler abstraction for Wasmer WebAssembly runtime8,559MIT No standard library WebAssembly embedded-nrf24l01A driver for NRF24L01(+) transceivers on embedded-hal platforms.8,558Apache-2.0 Embedded development Hardware support gd32e2Device support crate for GD32E2 devices8,545MIT OR Apache-2.0 Embedded development No standard library py32csdk-hal-sysPY32 HAL bindings8,544non-standard No standard library rustotAWS IoT8,536MIT OR Apache-2.0 Embedded development No standard library xbinEfficient byte array concatenation utilities / 高效字节数组拼接工具8,535MulanPSL-2.0 Data structures Development tools simple-hexA simple ASCII hex-to-bytes-and-back library8,5240BSD No standard library sonic-persist-fsFilesystem persistence for SONIC smart contracts8,520Apache-2.0 Algorithms Cryptography dmx-rdmRust library for communicating DMX512 (ANSI E1.11) and DMX-RDM (ANSI E1.20) over a RS485 bus by using interchangeable drivers.8,515MIT OR Apache-2.0 Embedded development Hardware support tlistType-level linked lists (of types) and type-level 'functions' to manipulate them. Because TList is implemented using GATs, usage…8,498MIT Algorithms Data structures ctaesA wrapper of Bitcoin Core's ctaes C library. ctaes is a simple constant-time AES implementation.8,498Apache-2.0 Cryptography Embedded development squfofShanks's square forms factorization8,495AGPL-3.0-or-later No standard library sharpenA rust library for iterator element condensing and sharpening.8,494MIT OR Apache-2.0 Algorithms No standard library peripheralsMicrocontroller peripherals definition and ergonomic access8,477MIT OR Apache-2.0 Embedded development Hardware support match_anyProvides a declarative macro, that matches an expression to any of the patterns and executes the same expression arm for any…8,474MIT OR Apache-2.0 No standard library Rust patterns indexsortYet another sort crate, porting Golang sort package to Rust.8,470MIT OR Apache-2.0 Algorithms Data structures parallel_vecA generic contiguous collection of heterogenous values.8,466MIT OR Apache-2.0 Data structures No standard library afe4404AFE4404 driver for Rust embedded-hal.8,462MIT Embedded development Hardware support edc2svdConvert register description from the EDC format to the SVD format8,456MIT Command line utilities Development tools sparql-storeA dataflow implementation of the SPARQL graph query language.8,444Unlicense Asynchronous No standard library noprotono-std, no-alloc protocol buffers implementation for embedded systems.8,442MIT OR Apache-2.0 Embedded development Encoding lsm6ds33A platform agnostic driver for the LSM6DS33 6-DoF Accel + Gyro IMU8,441non-standard Embedded development Hardware support fast-trapProvide a framework for bare-metal trap handling, aiming at ensuring performance while reusing code.8,437MulanPSL-2.0 OR MIT Embedded development Hardware support ws2812-asyncAsync SPI driver for ws2812 leds8,437MIT OR Apache-2.0 Embedded development Hardware support axplat-riscv64-visionfive2Implementation of axplat hardware abstraction layer for RISC-V VisionFive2 board8,435MIT OR Apache-2.0 Embedded development Hardware support mem_btreeA Data Structure of BTree Implemented with Rust, support snapshot. not use any unsafe lib.8,428MIT OR Apache-2.0 Data structures No standard library bind-halMCU HALs using binding, currently supports PY328,428non-standard No standard library otm8009aHardware Abstraction Layer for OTM8009A LCD controller IC8,427MIT Embedded development Hardware support into-resultA simple convenience trait for converting something into a `Result` or `Option`8,417Apache-2.0/MIT No standard library Rust patterns hdc20xxPlatform-agnostic Rust driver for the HDC2080, HDC2010 and HDC2021 low-power humidity and temperature digital sensor.8,417MIT OR Apache-2.0 Embedded development Hardware support ch32v2Device support crates for CH32V2 devices8,412MIT/Apache-2.0 Embedded development Hardware support efm32gg-pacPeripheral access API for EFM32GG MCU (generated using svd2rust)8,405BSD-3-Clause Embedded development Hardware support uartA clean implementation of the UART_16550 device functionality.8,400AGPL-3.0-or-later Embedded development No standard library drogue-embedded-timerMacro to shim heterogeneous HAL timers to embedded-time8,399Apache-2.0 Embedded development No standard library typicType-safe transmutations between layout-compatible types.8,396MIT/Apache-2.0 No standard library Rust patterns lit-htmlA library for rendering HTML8,393MIT OR Apache-2.0 No standard library WebAssembly satrs-mibHelper crate of the sat-rs framework to build a mission information base (MIB) from the On-Board Software (OBSW) code directly.8,391Apache-2.0 Aerospace Aerospace::Space protocols can-utilsHandy modules and utilities for manipulating CAN data and interfaces.8,387MIT Embedded development Hardware support byond-crc32Fast CRC-32/BYOND checksum computation8,386MIT OR Apache-2.0 Algorithms No standard library const-fracTypes for supporting floating point constants.8,385MIT OR Apache-2.0 No standard library nexus-asciiFixed-capacity ASCII strings for high-performance systems8,381MIT OR Apache-2.0 Data structures No standard library bitconvA simple, zero-dependency, no_std compatible Rust equivalent to the C# BitConverter class.8,371MIT No standard library keccakfAn implementation of the keccak-F[1600,800,400,200].8,370CC0-1.0 Cryptography No standard library type_level_valuesCrate for using type-level values and functions.8,364MIT/Apache-2.0 No standard library maybe-uninit-extExtended maybe-uninit types8,358Unlicense No standard library No standard library::No dynamic allocation nudgeA collection of optimization hints to improve performance8,358MIT/Apache-2.0 No standard library directorDirector is a simple, versatile, ergonomic state machine in Rust-lang.8,341MIT OR Apache-2.0 Algorithms Development tools