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.

volatile-memA library for managing volatile memory213,024Apache-2.0 Embedded development Memory management wasmer-clif-fork-frontendCranelift IR builder helper212,625Apache-2.0 WITH LLVM-exception No standard library rand04Re-export of rand 0.4, so it can be used together with a later version of rand.211,028MIT/Apache-2.0 Algorithms No standard library async-unsyncasynchronous, unsynchronized (thread-local) channels and semaphores210,164MIT/Apache-2.0 Asynchronous Concurrency musli-storagePartially upgrade stable format for Müsli suitable for storage.209,847MIT OR Apache-2.0 Encoding No standard library str-utilsThis crate provides some traits to extend `[u8]`, `str` and `Cow<str>`.209,270MIT No standard library Text processing rand04_compatWrappers for compatibility with rand 0.4.208,987MIT/Apache-2.0 Algorithms No standard library griddleA HashMap variant that spreads resize load across inserts208,575MIT OR Apache-2.0 Data structures No standard library mls-rsAn implementation of Messaging Layer Security (RFC 9420)207,837Apache-2.0 OR MIT Cryptography No standard library stakStak Scheme interpreter207,562MIT Compilers No standard library cranelift-interpreterInterpret Cranelift IR207,534Apache-2.0 WITH LLVM-exception No standard library stak-compilerStak Scheme bytecode compiler207,512MIT Compilers No standard library nrf-softdeviceRust interface to nRF SoftDevice207,362MIT OR Apache-2.0 Embedded development Hardware support align-addressFunctions for aligning addresses.207,327MIT OR Apache-2.0 No standard library miden-crypto-deriveProcedural macros for miden-crypto207,073MIT OR Apache-2.0 Cryptography No standard library device-registerA `no_std` library to describe the registers permissions of a device to ease driver development.206,977MIT OR Apache-2.0 Embedded development Hardware support fips205FIPS 205: Stateless Hash-Based Digital Signature Standard206,942MIT OR Apache-2.0 Cryptography No standard library nrf-softdevice-macroMacros for rust interface to nRF SoftDevice206,440MIT OR Apache-2.0 Embedded development Hardware support persistent-buffA buffer that stays persistent in ram between boots206,319MIT OR Apache-2.0 Embedded development No standard library bitset-coreStraightforward, no-std compatible, simd optimized, BitSet API205,839MIT Data structures No standard library tracepointRust API for Linux Tracepoints via user_events205,363MIT API bindings Development tools::Debugging bit_reverseComputes the bit reversal of primitive integers.205,332MIT/Apache-2.0 No standard library device-register-asyncA `no_std` library to describe the registers permissions of a device to ease async driver development.205,017MIT OR Apache-2.0 Embedded development Hardware support nrf-softdevice-s140Low-level bindings for the Nordic nRF SoftDevice S140204,518non-standard Embedded development Hardware support stak-macroMacros to integrate Stak Scheme204,032MIT Compilers No standard library postcard-rpcA no_std + serde compatible RPC library for Rust203,329MIT OR Apache-2.0 Embedded development No standard library arm-gicA driver for the Arm Generic Interrupt Controller version 2, 3 or 4.202,589MIT OR Apache-2.0 Embedded development Hardware support fnmatch-regexConvert a glob-style pattern to a regular expression.202,512BSD-2-Clause Encoding Filesystem extendhashRust Hash Extender201,700MIT OR Apache-2.0 Algorithms No standard library boa_icu_providerICU4X data provider for the Boa JavaScript engine.201,192Unlicense OR MIT Internationalization (i18n)No standard library len-traitLen trait for collectons.200,941CC0-1.0 Data structures No standard library trapframeHandle Trap Frame across kernel and user space on multiple ISAs.200,431MIT Embedded development No standard library stak-configurationStak Scheme configuration200,081MIT Compilers No standard library adskalmanKalman filter and Rauch-Tung-Striebel smoothing implementation using nalgebra, no_std199,395MIT/Apache-2.0 Algorithms No standard library peel-offPeel off a specific variant from a Rust enum, splitting it into the extracted variant and the residual197,690MIT No standard library Rust patterns tinyvec_stringtinyvec based string types193,482MIT OR Apache-2.0 Data structures No standard library iter-setSet operations on sorted, deduplicated iterators.193,453MIT OR Apache-2.0 Algorithms Data structures sdl3-sysLow level Rust bindings for SDL 3193,072Zlib External FFI bindings Game development automotive_diagUnified Diagnostic Services/UDS (ISO-14229-1), KWP2000 (ISO-142330), OBD-II (ISO-9141), and DoIP (ISO-13400) definitions to…192,598MIT OR Apache-2.0 Embedded development Encoding alloc_counterCount allocations, reallocations, deallocations. Allow, deny, or forbid allocations on an expression or function basis.192,379MIT OR Apache-2.0 Development tools::Debugging Development tools::Profiling stak-sacStand-Alone Complex for Stak Scheme191,586MIT Compilers No standard library miden-mast-packagePackage containing a compiled Miden MAST artifact with declared dependencies and exports190,863MIT OR Apache-2.0 Compilers No standard library sitronix-touchembedded-hal driver for Sitronix touch screen controllers: ST1615/ST1624/ST1633/ST1633i/ST1727/ST1912190,126MIT/Apache-2.0 No standard library embedded-io-adaptersAdapters between the `embedded-io` traits and other I/O traits187,325MIT OR Apache-2.0 Embedded development No standard library mallocatorUse malloc() and free() for memory management in Rust.186,791MIT OR Apache-2.0 Embedded development No standard library serde_bytes_ngOptimized handling of `[u8; N]`, `&[u8]` and `Vec<u8>` for Serde186,636MIT OR Apache-2.0 Encoding No standard library amplify_apfloatrustc_apfloat with u256 backend to utilize Octuple precision floating-point format186,407MIT OR Apache-2.0 No standard library errno-sysRaw FFI bindings to `errno` location.185,322MIT OR Apache-2.0 External FFI bindings No standard library wasmi_wasiWASI library support for the wasmi interpreter184,856MIT/Apache-2.0 No standard library Virtualization crate_interfaceProvides a way to define an interface (trait) in a crate, but can implement or use it in any crate.184,186Apache-2.0 Development tools::Procedural macro helpers No standard library uniswap-v3-sdkUniswap V3 SDK for Rust184,006MIT Cryptography::Cryptocurrencies Finance miden-utils-syncno-std compatible locking primitives for the Miden project183,847MIT OR Apache-2.0 No standard library sval_derive_macrosMinimal derive support for `sval`183,720Apache-2.0 OR MIT Encoding No standard library miden-debug-typesCore source-level debugging information types used throughout the Miden toolchain183,543MIT OR Apache-2.0 Compilers No standard library linera-wasm-instrumentInstrument and transform wasm modules.183,406MIT OR Apache-2.0 No standard library WebAssembly numeric-arrayWrapper around generic-array that adds efficient numeric trait implementations183,382MIT OR Apache-2.0 Data structures No standard library libafl_boltsLow-level bolts to create fuzzers and so much more183,365MIT OR Apache-2.0 Development tools::Testing Embedded development generic-ecGeneral elliptic curve cryptography183,007MIT OR Apache-2.0 Cryptography No standard library embedded-graphics-simulatorEmbedded graphics simulator182,996MIT OR Apache-2.0 Embedded development No standard library ieee802154Partial implementation of the IEEE 802.15.4 standard for low-rate wireless personal area networks182,4340BSD Embedded development Network programming genioA type safe, low level replacement for `std::io`. Supports `no_std` for embedded development, just disable cargo…182,324MIT/Apache-2.0 Embedded development No standard library miden-utils-diagnosticsDiagnostic infrastructure used in the Miden assembler and VM181,767MIT OR Apache-2.0 Compilers No standard library miden-assembly-syntaxParsing and semantic analysis of the Miden Assembly language181,644MIT OR Apache-2.0 Compilers No standard library fundspAudio processing and synthesis library.180,788MIT OR Apache-2.0 Multimedia::Audio No standard library atomicboxSafe atomic pointers to boxed data.180,456MIT/Apache-2.0 Concurrency No standard library aurora-evmAurora Ethereum Virtual Machine implementation written in pure Rust179,444MIT Compilers Cryptography::Cryptocurrencies fenwickFenwick tree: data structure that efficiently calculates prefix sums in a changing array of numbers.178,514MIT Algorithms Data structures serde-byte-arrayOptimized handling of `[u8; N]` for Serde177,976MIT OR Apache-2.0 Encoding No standard library stm32g0Device support crates for STM32G0 devices177,887MIT/Apache-2.0 Embedded development No standard library rootcauseA flexible, ergonomic, and inspectable error reporting library for Rust177,881MIT/Apache-2.0 No standard library Rust patterns epserdeε-serde is an ε-copy (i.e., almost zero-copy) serialization/deserialization framework177,662Apache-2.0 OR MIT Encoding No standard library ockam_vaultA software-only Ockam Vault implementation.177,310Apache-2.0 Algorithms Asynchronous lol_alloclol_alloc: A laughably simple wasm global_allocator.176,982MIT Memory management No standard library ingot-typesTraits and types used by ingot176,757MPL-2.0 Network programming No standard library coap-handlerInterface to CoAP handlers176,654MIT OR Apache-2.0 No standard library No standard library::No dynamic allocation ingot-macrosSupport macros for ingot176,607MPL-2.0 Network programming No standard library focaGossip-based cluster membership discovery, based on SWIM176,398MPL-2.0 Network programming No standard library ingotBare metal packet parsing176,045MPL-2.0 Network programming No standard library sha3-utilsSHA-3 utilities175,634BSD-3-Clause Cryptography No standard library trait-makeUtilities for working with impl traits in Rust175,512MIT OR Apache-2.0 Asynchronous No standard library panic-abortSet panicking behavior to abort175,277MIT OR Apache-2.0 No standard library recastingtraits for one-to-one recasting of values in data structures175,099MIT OR Apache-2.0 Data structures Memory management esp-syncSynchronization primitives for Espressif devices173,890MIT OR Apache-2.0 Concurrency Embedded development pmacGeneric implementation of Parallelizable Message Authentication Code173,785MIT OR Apache-2.0 Cryptography No standard library aluvmFunctional registry-based RISC virtual machine173,228Apache-2.0 Compilers Cryptography multiversx-sc-codec-deriveMacro implementations of multiversx-sc-codec #[derive(NestedEncode, NestedDecode, TopEncode, TopDecode)]172,495GPL-3.0-only Cryptography::Cryptocurrencies Development tools uidA crate for the creation of unique IDs.172,322GPL-3.0-or-later Concurrency Data structures esp-wifiA WiFi, Bluetooth and ESP-NOW driver for use with Espressif chips and bare-metal Rust172,275MIT OR Apache-2.0 Embedded development Hardware support align-dataSimply increase the alignment of any statics or include_bytes!172,051MIT No standard library musli-commonCommon utilities shared among Müsli encodings.171,895MIT OR Apache-2.0 Encoding No standard library multiversx-sc-codecLightweight binary serializer/deserializer, written especially for MultiversX smart contracts171,822GPL-3.0-only Cryptography::Cryptocurrencies Development tools uniswap-sdk-coreThe Uniswap SDK Core in Rust provides essential functionality for interacting with the Uniswap decentralized exchange171,470MIT Cryptography::Cryptocurrencies Finance mimxrt685s-pacPeripheral Access Crate for MIMXRT685s devices170,523MIT Embedded development No standard library nunnythe definitive non-empty slice/array/vec library for Rust170,151MIT OR Apache-2.0 Data structures Embedded development err_trailAdd context to errors through logging169,800Apache-2.0 No standard library Rust patterns orx-concurrent-vecA thread-safe, efficient and lock-free vector allowing concurrent grow, read and update operations.169,669MIT OR Apache-2.0 Concurrency Data structures cocoonA simple protected container with strong encryption and format validation.169,650MIT Cryptography No standard library hermit-syncSynchronization primitives for kernels.169,642MIT OR Apache-2.0 No standard library Rust patterns stak-macro-utilMacro utilities for Stak Scheme169,220MIT Compilers No standard library error_setQuick error declarations and automatic conversions between errors for precisely typed error handling. Inspired by Zig's error set…168,758Apache-2.0 No standard library Rust patterns nrf-usbdUSB driver for nRF microcontrollers168,213MIT OR Apache-2.0 Embedded development Hardware support generic_once_cellA bring-your-own-mutex version of once_cell.167,737MIT OR Apache-2.0 Memory management No standard library perchanceVery simple random number generation optimized for ease of use167,513MIT OR Apache-2.0 Algorithms No standard library icu_provider_registryA registry of all ICU4X data markers166,978Unicode-3.0 Embedded development Internationalization (i18n) memory_addrWrappers and helper functions for physical and virtual addresses166,696GPL-3.0-or-later OR Apache-2.0 OR MulanPSL-2.0 Memory management No standard library try-traitsAlternatives to std lib traits that can fail.165,996MIT OR Apache-2.0 No standard library Rust patterns traceloggingTraceLogging for Rust164,750MIT API bindings Development tools::Debugging reexport-proc-macroRe-export a procedural macro164,239MIT OR Apache-2.0 No standard library Rust patterns exclusive_cellA thread-safe, non-blocking, no-std cell that can only be accessed once.164,129MIT OR Apache-2.0 Memory management No standard library x86-alignment-checkx86 aligment check flag manipulation164,115MIT OR Apache-2.0 No standard library splay_treeSplay Tree based Data Structures (map, set, heap)164,017MIT Data structures No standard library fpmathA floating point math library162,704MIT OR Apache-2.0 Mathematics No standard library ethaddrEthereum public address162,702MIT OR Apache-2.0 Cryptography::Cryptocurrencies No standard library nmeaSimple NMEA 0183 parser162,192Apache-2.0 Embedded development No standard library tracelogging_dynamicTraceLoggingDynamic for Rust161,570MIT API bindings Development tools::Debugging esp32s3-halHAL for ESP32-S3 microcontrollers161,363MIT OR Apache-2.0 Embedded development Hardware support tari-tiny-keccakAn implementation of Keccak derived functions.160,993CC0-1.0 Cryptography No standard library icu_provider_sourceA data provider based on CLDR and ICU data.160,158Unicode-3.0 Embedded development Internationalization (i18n) unimockA versatile and developer-friendly trait mocking library159,981MIT Development tools Development tools::Testing modinverseSmall library for finding the modular multiplicative inverses.158,900Unlicense Algorithms Mathematics mls-rs-crypto-hpkeHPKE implementation based on mls-rs-crypto-traits used by mls-rs158,520Apache-2.0 OR MIT Cryptography No standard library atomic_once_cellThread-safe and lock-free OnceCell and Lazy158,357MPL-2.0 Concurrency No standard library systick-monotonicRTIC Monotonic implementation based on SysTick158,287MIT OR Apache-2.0 Concurrency Embedded development exhaustTrait and derive macro for working with all possible values of a type (exhaustive enumeration).157,931MIT OR Apache-2.0 Algorithms No standard library nano-leb128Little endian base 128 variable-length code compression157,720MIT/Apache-2.0 Compression Encoding btree_monstrousitya code port of BTreeMap but with comparator functions157,544MIT OR Apache-2.0 Data structures No standard library aes256ctr_poly1305aesPure Rust implementation of the AES256CTR-Poly1305AES Authenticated Encryption with optional architecture-specific hardware…157,083Apache-2.0 OR MIT Cryptography No standard library stdintC99 stdint/stdio types for easier interop156,714BSD-2-Clause Hardware support No standard library volatile-macroProcedural macros for the volatile crate.156,677MIT OR Apache-2.0 No standard library No standard library::No dynamic allocation boow`Borrow Or oWned` smart pointer. Alternative to Cow.156,565MIT Memory management No standard library ascon-aeadImplementation of the authenticated encryption schemes Ascon-AEAD128156,537Apache-2.0 OR MIT Cryptography No standard library eventheader_typesRust types for eventheader-encoded Linux Tracepoints via user_events156,402MIT API bindings Development tools::Debugging spideroak-cryptoSpiderOak's cryptography library156,369BSD-3-Clause Cryptography No standard library icu_provider_exportGenerate data for ICU4X DataProvider156,200Unicode-3.0 Embedded development Internationalization (i18n) esp32s2-halHAL for ESP32-S2 microcontrollers155,999MIT OR Apache-2.0 Embedded development Hardware support elrond-wasm-nodeElrond WebAssembly VM API wrapper155,866GPL-3.0-only Cryptography::Cryptocurrencies Development tools::FFI device-driverA toolkit to write better device drivers, faster155,702MIT OR Apache-2.0 Embedded development Hardware support axerrnoGeneric error code representation.155,557GPL-3.0-or-later OR Apache-2.0 OR MulanPSL-2.0 No standard library Operating systems cam-geomGeometric models of cameras for photogrammetry154,976MIT OR Apache-2.0 Algorithms Computer vision ssh-encoding-fork-artiPure Rust implementation of SSH data type decoders/encoders as described in RFC4251153,851Apache-2.0 OR MIT Authentication Cryptography ssh-cipher-fork-artiPure Rust implementation of SSH symmetric encryption including support for the modern…153,813Apache-2.0 OR MIT Cryptography No standard library efd1D/2D/3D Elliptical Fourier Descriptor (EFD) implementation in Rust.153,811MIT No standard library ssh-key-fork-artiPure Rust implementation of SSH key file format decoders/encoders as described in RFC4251/RFC4253 and OpenSSH key formats, as…153,750Apache-2.0 OR MIT Authentication Cryptography spectrum-analyzerAn easy to use and fast `no_std` library (with `alloc`) to get the frequency spectrum of a digital signal (e.g. audio) using FFT.152,310MIT Multimedia No standard library stak-fileFile system for Stak Scheme151,559MIT Compilers No standard library shipyardEntity Component System150,981MIT OR Apache-2.0 Concurrency Data structures keycodeA Rust crate for translating keycodes based on Chrome's mapping of keys.150,366MIT Embedded development Hardware support archmageSafely invoke your intrinsic power, using the tokens granted to you by the CPU. Cast primitive magics faster than any mage alive.150,113MIT OR Apache-2.0 Development tools Hardware support integral_constantType-level wrappers around constant values150,080Apache-2.0 No standard library take-staticStatic items that provide mutable access only once.149,313MIT OR Apache-2.0 Memory management No standard library percpu_macrosMacros to define and access a per-CPU data structure148,640GPL-3.0-or-later OR Apache-2.0 OR MulanPSL-2.0 Development tools::Procedural macro helpers No standard library miden-txMiden blockchain transaction executor and prover148,503MIT No standard library cachesThis is a Rust implementation for popular caches (support no_std).148,483MIT OR Apache-2.0 Algorithms Data structures percpuDefine and access per-CPU data structures148,222GPL-3.0-or-later OR Apache-2.0 OR MulanPSL-2.0 Development tools::Procedural macro helpers No standard library call-onceA type that can only be called sucessfully once.147,702MIT OR Apache-2.0 No standard library Rust patterns tt21100An embedded-hal driver for the TT21100 multi-touch touchscreen controller147,644MIT OR Apache-2.0 Embedded development No standard library stak-process-contextProcess context for Stak Scheme147,199MIT Compilers No standard library aneubeck-daachorseDaachorse: Double-Array Aho-Corasick146,822MIT OR Apache-2.0 Algorithms Data structures rangesThis crate provides a generic alternative to core/std ranges, set-operations to work with them and a range set that can…146,437LGPL-3.0-or-later Algorithms Data structures clienteleClientele packages `clap`, `camino`, `dotenvy`, `wild`, `argfile`, and `getenv` into one dependency.146,125Unlicense Command-line interface No standard library imxrt-ralRegister access layer for all NXP i.MX RT microcontrollers145,302MIT/Apache-2.0 Embedded development No standard library lenderA lending-iterator trait based on higher-rank trait bounds, with full std::iter::Iterator functionality145,102Apache-2.0 OR LGPL-2.1-or-later OR MIT No standard library Rust patterns boilerplateMinimal compile-time Rust template engine144,420CC0-1.0 No standard library Template engine opencv-ros-cameraGeometric models of OpenCV/ROS cameras for photogrammetry143,803MIT OR Apache-2.0 Algorithms Computer vision substrate-fixedFixed-point numbers143,299MIT/Apache-2.0 Algorithms Data structures blink-allocFast, concurrent, arena-based allocator with drop support143,227MIT OR Apache-2.0 Memory management No standard library mimxrt633s-pacPeripheral Access Crate for MIMXRT633s devices142,635MIT Embedded development No standard library serde-human-bytesOptimized handling of `&[u8]` and `Vec<u8>` for Serde142,548MIT OR Apache-2.0 Encoding No standard library astro-floatMultiple precision floating-point numbers library.141,954MIT Algorithms Data structures originProgram startup and thread support written in Rust141,890Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT No standard library agnostic-lite`agnostic-lite` is an agnostic abstraction layer for any async runtime.140,942MIT OR Apache-2.0 Asynchronous No standard library minimqAn MQTT5 client140,766MIT Database interfaces Embedded development opoolHigh-performance, lock-free local and concurrent object pool with automated allocation, cleanup, and verification.139,828MIT Concurrency Memory management mitseinStrongly typed APIs for non-empty collections, slices, and iterators.139,567MIT Data structures No standard library pcg-mwcA fast non-cryptographic psudo random number generator139,418MIT OR Apache-2.0 Algorithms No standard library bandwidthA library for representing bandwidth speed in a variety of units, mimicking the `core::time::Duration` struct.138,796Apache-2.0 Data structures Network programming musli-wireFully upgrade stable format for Müsli suitable for network communication.138,609MIT OR Apache-2.0 Encoding No standard library memory_addressesUnified virtual and physical address types for the Hermit ecosystem and beyond138,496MIT/Apache-2.0 Memory management No standard library arm-pl011-uartArm PrimeCell UART (PL011) driver138,391MIT OR Apache-2.0 Embedded development Hardware support multiversx-sc-wasm-adapterMultiversX WebAssembly VM API wrapper138,355GPL-3.0-only Cryptography::Cryptocurrencies Development tools::FFI pre-proc-macroProcedural marco implementations for [pre](https://crates.io/crates/pre/).138,311MIT OR Apache-2.0 Development tools No standard library preCompile-time assistance for working with unsafe code.137,859MIT OR Apache-2.0 Development tools No standard library register-countCounting `Register`s created by a `Counter`137,128MIT Asynchronous No standard library nrf52840-halHAL for nRF52840 microcontrollers136,952MIT OR Apache-2.0 Embedded development Hardware support dharitri-wasmDharitri WebAssembly smart contract API136,500GPL-3.0-only Cryptography::Cryptocurrencies Development tools json-rpc-typesType definitions for JSON-RPC135,957BSL-1.0 No standard library atsamd21gPeripheral access API for ATSAMD21G microcontrollers (generated using svd2rust)135,897MIT OR Apache-2.0 Embedded development Hardware support fdt-parserA crate for parsing FDT135,644MPL-2.0 Embedded development No standard library miden-utils-indexingType-safe u32-indexed vector utilities for Miden135,161MIT OR Apache-2.0 Development tools No standard library safe_unaligned_simdSafe SIMD wrappers for unaligned load and store operations.134,898MIT OR Apache-2.0 API bindings Hardware support zed-ximXIM protocol parser, handler134,739MIT No standard library Parser implementations dcborDeterministic CBOR ("dCBOR") for Rust.134,586BSD-2-Clause-Patent Data structures Encoding orx-concurrent-optionConcurrentOption is a lock-free concurrent read and write option type.134,435MIT OR Apache-2.0 Concurrency Data structures ethnum-macros256-bit integer literals134,421MIT OR Apache-2.0 Cryptography::Cryptocurrencies Mathematics mendeleevList of chemical elements, their isotopes, and their properties134,400MIT OR Apache-2.0 No standard library No standard library::No dynamic allocation atomic-primitiveTraits for primitive atomic types134,316MIT OR Apache-2.0 Concurrency No standard library elrond-codecLightweight binary serializer/deserializer, written especially for Elrond smart contracts133,880GPL-3.0-only Cryptography::Cryptocurrencies Development tools deterministic-hashCreate deterministic hashes regardless of architecture133,296MIT Cryptography No standard library kernel_guardRAII wrappers to create a critical section with local IRQs or preemption disabled133,147Apache-2.0 No standard library Operating systems dusk-poseidonImplementation of Poseidon hash algorithm over the Bls12-381 Scalar field.132,797MPL-2.0 Algorithms Cryptography