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.

nstrA no_std, no_alloc, embedded-friendly string library6,701MIT Data structures Embedded development ahtx0An async driver implementation for the AHT10 and AHT20 sensors (no-std)6,699MIT OR Apache-2.0 Embedded development Hardware support scl3300Driver for the SCL3300 inclinometer.6,698MIT OR Apache-2.0 Embedded development Hardware support pic32-config-sectorCalculate constant values for PIC32 configuration words6,697MIT OR Apache-2.0 Embedded development Hardware support osiCapability-based Standard Interfaces6,685MIT OR Apache-2.0 OR LGPL-2.1-or-later No standard library Operating systems sp-imImmutable datatypes for no_std use within Substrate6,675MIT Data structures No standard library zarrayCache-optimized 2D and 3D arrays using Morton order (aka Z-order) Z-indexed storage, with a convenient API for common 2D and 3D…6,671MIT Algorithms Memory management hts221Interface to ST Micro HTS221 humidity and temperature sensor6,665MIT/Apache-2.0 Embedded development Hardware support adafruit_nxpDriver for Adafruit Precision NXP 9-DOF Breakout Board - FXOS8700 + FXAS21002 modules6,6600BSD Embedded development Hardware support grixyZero-cost 2D grids for embedded systems and graphics6,659MIT OR Apache-2.0 Embedded development Game development ezhookFunction hooking for x866,653MIT Hardware support No standard library mk20d7Peripheral access API for MK20D7 microcontrollers6,652MIT Embedded development Hardware support onebitsyBoard Support Crate for the 1Bitsy development board6,652MIT Embedded development Hardware support ruspiro-interrupt-coreInterrupt core functions to globally enable/disable interrupts on Raspberry Pi6,650Apache-2.0 Embedded development No standard library ekvKey-value database for embedded systems, for raw NOR flash, using an LSM-Tree6,644MIT OR Apache-2.0 Asynchronous Database implementations stm32f1xx-lalLAL for the STM32F1xx family6,639MIT OR Apache-2.0 Embedded development No standard library layered-bitsetBit set implementation using layered structure6,637MIT OR Apache-2.0 Algorithms No standard library flipsRust bindings to Flips, the Floating IPS patcher.6,637GPL-3.0 API bindings Emulators efm32g-pacPeripheral access API for EFM32G MCU (generated using svd2rust)6,633BSD-3-Clause Embedded development Hardware support derive_type_levelmacro 1.1 for type_level values and users of them.6,630MIT/Apache-2.0 No standard library efm32hg-pacPeripheral access API for EFM32HG MCU (generated using svd2rust)6,630BSD-3-Clause Embedded development Hardware support process-imageZero-cost abstraction for convenient access to process image tags.6,626MIT OR Apache-2.0 Memory management No standard library simple-tokenizerA tiny no_std tokenizer with line & column tracking.6,625MIT No standard library No standard library::No dynamic allocation veml6040Platform-agnostic Rust driver for the VEML6040 RGBW color light sensor.6,623MIT OR Apache-2.0 Embedded development Hardware support sacp-cborSACP-CBOR/1: strict deterministic CBOR validation and canonical encoding (hot-path optimized, no_std-capable).6,621MIT Encoding No standard library uefi-graphicsAn embedded-graphics display driver for UEFI environments6,620MIT OR Apache-2.0 Embedded development Hardware support ltr303Platform agnostic Rust driver for the LTR-303 Ambient Light Sensor.6,617Apache-2.0 Embedded development Hardware support btrfs-diskformatAn implementation of the BTRFS disk format.6,610BSD-2-Clause Filesystem No standard library kea-halHAL for NXP KEA devices.6,610MIT Embedded development No standard library efm32pg-pacPeripheral access API for EFM32PG MCU (generated using svd2rust)6,606BSD-3-Clause Embedded development Hardware support rustyhdf5-formatPure-Rust HDF5 binary format parsing and writing — no C dependencies6,600MIT Encoding No standard library trasyA library for error handling with tracing and backtrace support6,597Apache-2.0 Development tools::Debugging No standard library shogi_usi_parserConversion from strings in USI format6,594MIT Game development Game engines embedded-controlsBased on switch-hal library that allows to handle primitive controls(buttons, encoders and etc.)6,590MIT OR Apache-2.0 Embedded development Hardware support efm32tg-pacPeripheral access API for EFM32TG MCU (generated using svd2rust)6,588BSD-3-Clause Embedded development Hardware support wasmer-types-uncWasmer Common Types6,578MIT OR Apache-2.0 WITH LLVM-exception Data structures No standard library try-rwlockFast non-blocking readers-writer lock6,578MIT OR Apache-2.0 Concurrency Data structures efm32pg22-pacPeripheral access API for EFM32PG22 MCU (generated using svd2rust)6,575BSD-3-Clause Embedded development Hardware support sbi-testingProvide a set of test cases for supervisors to verify functions of the supervisor executation environment6,574MulanPSL-2.0 OR MIT No standard library Operating systems scd30-modbusSCD30 driver implementation6,573MIT OR Apache-2.0 Embedded development Hardware support director_macrosDirector is a simple, versatile, ergonomic state machine in Rust-lang.6,570MIT OR Apache-2.0 Algorithms Development tools imxrt-uart-logLogging over an i.MX RT serial interface6,569MIT OR Apache-2.0 Embedded development No standard library nmea2000An NMEA 2000 library6,569MIT Embedded development No standard library bitflags-derive-macrosbitflags-aware #[derive] macros.6,565MIT OR Apache-2.0 No standard library luciaA flexible client API framework as well as a set of API collections6,564MIT Asynchronous Data structures ablerTiny type to process various ablers/flags/etc as one6,564MIT No standard library rand-facadeA global mutex-based random facade for no_std compatible libraries that require an initialised random number generator6,561MIT No standard library stm32h7-ethernetDrivers for Ethernet on STM32H76,559MIT/Apache-2.0 Embedded development Hardware support disuseThe way to notify the implementation which return value is disuse.6,557MIT OR Apache-2.0 No standard library Rust patterns brie-treeA fast B+ Tree implementation that uses integer keys6,555Apache-2.0 OR MIT Data structures No standard library gba_clockA real-time clock library for the GBA.6,555MIT OR Apache-2.0 Date and time Game development entro-sortEntro Sort is an in-place, linearithmic, unstable sorting algorithm.6,554MIT-0 Algorithms Embedded development turbomodA fork of `automod` with some extra features.6,554MIT OR Apache-2.0 Development tools::Build Utils Filesystem arb-alloy-consensusArbitrum-specific consensus primitives on top of alloy: tx envelopes, receipt variants, and RLP encode/decode used by arb-reth.6,552MIT OR Apache-2.0 Cryptography::Cryptocurrencies Encoding static-boxA stack-allocated box that stores trait objects.6,542MIT OR Apache-2.0 Data structures No standard library blinksy-espno-std, no-alloc LED control library for 1D, 2D, and 3D layouts6,541EUPL-1.2 Embedded development Hardware support ppm_decodeParser for the Pulse Position Modulation (PPM/CPPM) radio control (RC) protocol6,528BSD-3-Clause Embedded development Hardware support mcp4xPlatform-agnostic Rust driver for the MCP4x digital potentiometers.6,528MIT OR Apache-2.0 Embedded development Hardware support ipl3checksumLibrary to calculate the IPL3 checksum for N64 ROMs6,528MIT No standard library No standard library::No dynamic allocation efm32jg1b-pacPeripheral access API for EFM32JG1B MCU (generated using svd2rust)6,524BSD-3-Clause Embedded development Hardware support dxprDifferentiable expression templates in compile-time, dependency-free, no_std Rust.6,523Zlib Algorithms Data structures ccl_stable_deref_traitAn unsafe marker trait for types like Box and Rc that dereference to a stable address even when moved, and hence can be used with…6,521MIT/Apache-2.0 Memory management No standard library seven_segmentA simple driver for seven segment displays6,515MITNFA Embedded development No standard library tsil_cevLinkedList on Vec6,512MIT Algorithms Data structures optionally_constOptional constness on stable Rust.6,509MIT OR Apache-2.0 No standard library Rust patterns bno08x-rvcSmall library to parse bno08x-sensor (bno080, bno085, bno086) output in RVC mode. Based on lockless queues.6,500MIT OR Apache-2.0 Embedded development No standard library lis3dh-spino_std driver for the ultra-low-power high-performance 3-axis "nano" accelerometer LIS3DH using SPI6,496MIT OR Apache-2.0 Embedded development No standard library dyn-ptrA box that stores types like pointers, forgetting everything besides `Self: Unsize<dyn Trait>`6,494MIT Data structures No standard library peek-againA performant iterator providing double peek functionality.6,486MIT OR Apache-2.0 Algorithms No standard library moverefTypes and traits for safe C++ style placement initialization and move semantics6,485Apache-2.0 WITH LLVM-exception Compilers External FFI bindings charmapA library for one-to-(none/one/many) character mapping.6,485MIT OR Apache-2.0 No standard library Text processing efm32jg12b-pacPeripheral access API for EFM32JG12B MCU (generated using svd2rust)6,482BSD-3-Clause Embedded development Hardware support simbleSimple symbols: allocation-less strings up to 8 bytes long6,475MIT OR Apache-2.0 No standard library keyword-parserKeyword parser for combine.6,474MIT OR Apache-2.0 No standard library Parsing tools cortex-mpuAn interface for the Memory Protection Unit (MPU) in Cortex-M microcontrollers6,473Apache-2.0 Embedded development No standard library fpFast & safe fixed-point arithmetic via compile-time checks6,473MIT Embedded development No standard library vte-graphicsvte fork for the Alacritty's graphics patch6,472Apache-2.0 OR MIT No standard library Parsing tools arb-alloy-predeploysArbitrum predeploy addresses, selectors, and helpers compatible with Nitro/ArbOS encodings.6,466MIT OR Apache-2.0 Cryptography::Cryptocurrencies No standard library bitintInteger types that have a logical size measured in bits.6,464MIT Data structures No standard library r3_support_rp2040Supporting package for running R3-OS on RP20406,458MIT OR Apache-2.0 Embedded development No standard library rvf-typesRuVector Format core types -- segment headers, enums, flags6,457MIT OR Apache-2.0 Data structures No standard library drogue-bme680A crate to interface with the BME680 environmental sensor6,456BSD-3-Clause Embedded development No standard library bitwisePortable high-level bitwise manipulation algorithms.6,454MIT Algorithms Hardware support sparql-parserA dataflow implementation of the SPARQL graph query language.6,451Unlicense Asynchronous No standard library efm32zg-pacPeripheral access API for EFM32ZG MCU (generated using svd2rust)6,449BSD-3-Clause Embedded development Hardware support ads129xxDriver crate for the Texas Instruments ADS1292 24-bit 2-channel low-power analog front end for ECG applications.6,447non-standard Embedded development Hardware support pscontroller-rsA hardware-level platform agnostic driver for PlayStation 1 or 2 contoller peripherals. Requires soldering. 😁6,442MIT OR Apache-2.0 Embedded development Hardware support std-traitsTraits for types in the standard library.6,439MIT OR Apache-2.0 Algorithms Mathematics const_sizes提供友好可读的常量大小6,437Apache-2.0 Embedded development Memory management rust-chainrust library for writing EOS rust smart contracts6,431Apache-2.0 Embedded development No standard library rdf-store-tursoA Turso storage adapter for RDF.rs knowledge graphs.6,430Unlicense Data structures No standard library cfap_screenAn embedded-hal based driver for ePaper displays from Crystalfontz.6,429MIT OR Apache-2.0 Embedded development No standard library async-stm32f1xxAbstractions for asynchronous programming on the STM32F1xx family of microcontrollers.6,414MIT OR Apache-2.0 Asynchronous Embedded development bern-confBern RTOS default configuration.6,402MIT Embedded development No standard library load-bufferCrate for loading data into a fixed-sized buffer. Similar to BufRead, but allowing static or dynamic sizes, and no_std use.6,401MPL-2.0 No standard library No standard library::No dynamic allocation mvbitfieldGenerates types to work with bit-aligned fields.6,398MIT Data structures No standard library bootmgr-rs-coreA framework for easily creating boot managers in Rust6,397MIT Embedded development No standard library asm_blockTranslate tokens to string for Rust inline assembly6,395MIT OR Apache-2.0 No standard library Rust patterns cortex-r-rtRun-time support for Arm Cortex-R6,388MIT OR Apache-2.0 Embedded development No standard library py32f0Device support crates for PY32F0 devices6,385MIT/Apache-2.0 Embedded development No standard library channels-packetUtilities to parse channels packets.6,381MIT No standard library Parser implementations zendeA zigzag encoding/decoding library6,377MIT Encoding No standard library aorist_pasteA fork of the paste module: (v 1.0.4) with a small change for inflector behavior. Do not use unless using the aorist project.6,375MIT OR Apache-2.0 No standard library lps22hbA platform agnostic driver to interface with LPS22HB pressure sensor module.6,371MIT Embedded development Hardware support tarfsTar reading library, designed for using in embedded systems6,359MIT Filesystem No standard library ili9163_driverLibrary implements low level control over LCD graphical display equipped with ILI9163 driver.6,357MIT OR Apache-2.0 Embedded development No standard library tinyboxLike `Box`, but with an optimization that avoids allocations for small data-structures6,356MIT OR Apache-2.0 Data structures No standard library first-errFind the first Err in Iterator<Item = Result<T, E>> and allow iterating continuously.6,354MIT No standard library No standard library::No dynamic allocation tinyvecdeq`VecDeque`-like data structures6,346Zlib OR Apache-2.0 OR MIT Data structures No standard library compostAdds a macro to decompose tuples into tuples containing a subset of their values6,343MIT No standard library Rust patterns gihex-hc-sr04Library to access HC-SR04 ultrasonic sensor6,343MIT Embedded development No standard library pallet-commoditiesA unique asset (NFT) interface and a Substrate FRAME implementation optimized for commodity assets.6,342Unlicense Cryptography::Cryptocurrencies Data structures predicatorpredicator allows the creation, loading, and unloading of Rust and other language plugins on the fly using LLVM's ORC JIT6,330AGPL-3.0 No standard library flexonSIMD accelerated JSON parser6,329MIT Encoding No standard library basic-oopSimple OOP for Rust.6,327MIT OR Apache-2.0 No standard library Rust patterns stylicA simple, fast library for styling text with ANSI escape codes6,325MPL-2.0 Command-line interface No standard library moondancer-pacA peripheral access crate for the Cynthion Moondancer SoC6,317BSD-3-Clause Embedded development Hardware support teensy4-selfrebootorA self-rebooting implementation of teensy's rebootor for teensy46,314MIT OR Apache-2.0 Embedded development No standard library async-embedded-traitsA set of async traits for embedded systems6,311MIT OR Apache-2.0 Asynchronous Embedded development thermal_printerHigh level API for interacting with CSN-A2 thermal printer6,310Apache-2.0 Embedded development Hardware support linux-file-infoThis crate is for gathering useful infos about linux entities(files, folders or symlinks) with developer friendly way.6,307MIT Data structures Filesystem hardware-registersGeneric, embedded-friendly hardware registers support, including traits and types for understanding I2C registers.6,301EUPL-1.2 OR Apache-2.0 OR MIT Embedded development Hardware support llml_simd_procProcedural macros for llml_simd6,301MIT Embedded development Hardware support ad5668Rust Embedded HAL driver for Analog Devices AD5668 DAC6,295MIT/Apache-2.0 Embedded development No standard library persistent_ropeAn immutable persistent rope data structure6,293MIT Data structures No standard library spms_ringSingle publisher, multiple subscriber ring buffer for pubsub6,292BSD-3-Clause Concurrency Embedded development bitflags-derivebitflags-aware #[derive] macros.6,289MIT OR Apache-2.0 No standard library embedded-picofontThe PICO-8 font to use with embedded-graphics6,286MIT Embedded development No standard library bl702-pacEmbedded Rust's Peripheral Access Crate for BL702/BL704/BL706 RISC-V BLE + Zigbee microcontroller6,284MIT OR Apache-2.0 Embedded development Hardware support mplusfontsParametrized bitmap font family for embedded-graphics6,282MIT OR Apache-2.0 Embedded development Graphics toast-cellZero-cost type-branded cell with no runtime checks6,281BlueOak-1.0.0 Memory management No standard library random_struct_layoutThe custom attributes to randomize struct members layout6,280MIT No standard library u24An unsigned 24-bit integer type.6,277MIT OR Apache-2.0 Data structures Encoding levarint64Little-Endian VARiable-length INTeger codec, compatible with no_std.6,273MIT OR Apache-2.0 Embedded development No standard library kll-compilerKLL (Keyboard Layout Language) Compiler - Rust Edition6,272MIT OR Apache-2.0 Embedded development No standard library sorthForth inspired interpreted programming language.6,272MIT No standard library exhaustive-mapAn exhaustive map for types with finite inhabitants6,272MIT OR Apache-2.0 Data structures No standard library substance-frameworkA testing framework designed to work without std, using only core features6,266MIT Development tools Development tools::Testing recursive_referenceThis crate provides a way to walk on recursive structures easily and safely.6,266MIT OR Apache-2.0 Data structures No standard library inplaceA container that allows you temporarily take ownership of the stored value.6,265MIT/Apache-2.0 No standard library Rust patterns assert_panic_freeAssert that some code is panic-free. Fast to compile, no syn or macros etc...6,254MIT/Apache-2.0 Development tools Development tools::Testing platform-serialplatform-serial is the generic trait of generic serial interface for embedded-nano-mesh crate6,250non-standard Date and time Embedded development n32g4xx-halPeripheral access API for N32G4xx series microcontrollers6,2480BSD Embedded development Hardware support refmoveAn experimental implementation of library-level by-move references6,247MIT / Apache-2.0 Memory management No standard library sysCapability-based System Interfaces6,242MIT OR Apache-2.0 OR LGPL-2.1-or-later No standard library Operating systems xtensa-lx6-rtLow level access for xtensa lx6 processors6,240MIT OR Apache-2.0 Embedded development Hardware support nimageA simple imaging library6,236MIT Graphics Multimedia fullcodec_rand_xorshiftXorshift random number generator6,234MIT OR Apache-2.0 Algorithms No standard library complete-picA complete interface for the legacy 8259 PIC and the newer APIC.6,223MIT Hardware support No standard library lsm303dlhc-ngA platform agnostic driver to interface with the LSM303DLHC (accelerometer + compass)6,222MIT OR Apache-2.0 Embedded development Hardware support EventEmitterAn EventEmitter object inspired by NodeJS.6,219MIT No standard library array-dequeFixed-capacity circular buffer implementations: heap-allocated ArrayDeque and stack-allocated StackArrayDeque. Efficient O(1)…6,217MIT Data structures No standard library const-arrayvecA vec-like type backed by an array on the stack.6,205MIT OR Apache-2.0 Data structures Embedded development flat_stringFlatString is a fixed-size String that can be created directly on the stack.6,204MIT Data structures No standard library closed-interval-setUnions of closed intervals as containers of pairs6,199MIT Data structures No standard library tuple-hashTupleHash per NIST SP 800-1856,196BSD-3-Clause Cryptography No standard library quaternion-wrapperOperator overloading allows implementation similar to mathematical expressions.6,196MIT OR Apache-2.0 Mathematics No standard library cantorA general toolkit for working with types that have a small number of values6,193MIT OR Apache-2.0 Compression No standard library usbd-hid-deviceUSB HID class support for microcontrollers6,187MIT OR Apache-2.0 Embedded development Hardware support finalizableA type for finalizable values6,187MIT No standard library No standard library::No dynamic allocation msp432p401rPeripheral access API for TI MSP432P401R and MSP432P401M microcontrollers generated using svd2rust6,176MIT Embedded development Hardware support dht-hal-drvHAL based driver for digital humidity and temperature sensors DHT11, DHT21, DHT226,171non-standard Embedded development No standard library candlestick-rsCandlestick pattern recognition library for technical analysis6,171MIT Algorithms Finance apds9960Platform-agnostic Rust driver for the APDS9960 digital proximity, ambient light, RGB and gesture sensor.6,161MIT OR Apache-2.0 Embedded development Hardware support intrusive_splay_treeAn intrusive splay tree implementation that is no-std compatible and free from allocation and moves.6,158MPL-2.0 Data structures Memory management sunscreen_curve25519A pure-Rust implementation of group operations on ristretto255 and Curve255196,147BSD-3-Clause Cryptography No standard library aeonfluxComposable, lightweight, fast attribute-based anonymous credentials with infinite (aeon) rerandomised (flux) presentations using…6,144BSD-3-Clause Cryptography No standard library lazy_fnlazy_static for functions!6,139MIT OR Apache-2.0 Memory management No standard library numbat-codec-deriveMacro implementations of numbat-codec #[derive(NestedEncode, NestedDecode, TopEncode, TopDecode)]6,139GPL-3.0-only Cryptography::Cryptocurrencies Development tools nexus-bits-deriveDerive macros for nexus-bits. Use nexus-bits instead of depending on this directly.6,139MIT OR Apache-2.0 Data structures No standard library utf-32-to-utf-8Convert UTF-32 to UTF-8 encoding.6,137MIT-0 Embedded development Encoding tg-rcore-tutorial-syscallSystem call definitions and interfaces for rCore tutorial OS.6,134GPL-3.0 Embedded development No standard library purezenRuntime for the Pure Data (Pd) audio programming language, implemented as an extensible audio library allowing full…6,133LGPL-3.0 Embedded development Multimedia::Audio stm32l1xx-halPeripheral access API for STM32L1 series microcontrollers6,127MIT/Apache-2.0 Embedded development Hardware support lpc11xx-async-halAsynchronous HAL for the NXP LPC111x/LPC11Cxx/LPC11xxL/LPC11xxXL family of Cortex-M0 microcontrollers6,125MIT Embedded development Hardware support rodeoFast dropping arena based on bumpalo6,123MIT OR Apache-2.0 Memory management No standard library zkp-mmap-vecReplacement for `Vec` that uses file-backed storage6,117Apache-2.0 Algorithms Memory management product-os-netUnified networking types for std and no_std environments - seamlessly re-exports from std::net or no-std-net based on feature…6,116GPL-3.0-only Network programming No standard library gas-index-algorithmAn unofficial Rust port of Sensirion's gas-index-algorithm6,106BSD-3-Clause No standard library multindexIndex slices with multiple const indices/ranges.6,101Zlib No standard library Rust patterns hash2fieldImplements safe hash to a finite field as described in…6,098Apache-2.0 Cryptography No standard library aarch32-rtRun-time support for Arm AArch326,096MIT OR Apache-2.0 Embedded development No standard library csidhPure Rust implementation of the CSIDH cryptographic algorithm for secret key exchange. Provides a no_std-friendly implementation.…6,091Apache-2.0 OR MIT Cryptography No standard library chachachaSIMD optimized implementations of the Chacha stream cipher6,085MIT Algorithms Cryptography is31fl3743bBare-metal no_std driver for the Lumissil IS31FL3743B6,081MIT OR Apache-2.0 Embedded development No standard library picorv32-rtMinimal runtime / startup for PicoRV32 RISC-V CPU6,080ISC Embedded development No standard library time-localMake working with local offsets from the [time](https://crates.io/crates/time) crate a little easier.6,078MIT OR Apache-2.0 Date and time No standard library bmp388A platform agnostic driver to interface with the BMP388 pressure sensor6,075MIT Embedded development Hardware support iscloseA collection of trait and macros for comparing approximate equality6,075MIT OR Apache-2.0 Mathematics No standard library clintCLosure INTerrupt handlers.6,074LGPL-3.0-or-later Asynchronous Embedded development crc8-rsA heapless no-std library for doing 8-bit cyclic redundancy checks6,072MIT Embedded development No standard library eeiA hyper minimalistic but well documented interface to Ethereum Environment Interface6,071MIT OR Apache-2.0 No standard library WebAssembly embedded-timersSoftwaretimers and -delays (ms/us) based on a Clock implementation6,063OLFL-1.3 Embedded development No standard library rp2040-multicore-per-cpuEnable use of per-core static variables on rp20406,062MIT OR Apache-2.0 Concurrency Embedded development efm32gg-halHAL for the EFM32GG (EFM32 Giant Gecko) family of microcontrollers6,062MIT OR Apache-2.0 Embedded development No standard library k1921vk01t-pacAPI доступа к периферии микроконтроллера НИИЭТ К1921ВК01Т.6,056MIT OR Apache-2.0 Embedded development Hardware support ncp5623Simple driver for the ON Semiconductor NCP5623 I2C RGB LED driver6,055MIT Embedded development Hardware support bootkbdBoot-protocol keyboard driver for usb-host.6,050GPL-3.0-or-later Embedded development Hardware support min_max_traitsTraits for MIN and MAX associated constants6,036MIT OR Apache-2.0 Mathematics No standard library cnpjBrazilian CNPJ parsing, validating and formatting library.6,033MIT No standard library