* [LwGPS](https://github.com/MaJerle/lwgps) - Lightweight GPS NMEA parser for embedded systems
* [LwESP](https://github.com/MaJerle/lwesp) - lightweight ESP AT commands parser library to communicate with ESP8266 or ESP32 Wi-Fi module using AT commands
* [LwGSM](https://github.com/MaJerle/lwgsm) - Library for SIMCOM GSM modules to communicate with AT commands and RTOS from host device
* [Embedded_Printf](https://github.com/agaelema/Embedded_Printf) - Embedded version of the famous "printf( )" function. The idea is create an simple and efficient library to meet some common needs in embedded systems
* [tinyprintf](https://github.com/cjlano/tinyprintf) - tiny printf and sprintf library for small embedded systems
* [libmemory](https://github.com/embeddedartistry/libmemory) - memory management library with implementations for malloc(), free(), and other useful memory management functions
* [lwmem](https://github.com/MaJerle/lwmem) - Lightweight dynamic memory manager library for embedded systems with memory constraints. It implements malloc, calloc, realloc and free functions
* [xmodem](https://github.com/bsail/xmodem) - XMODEM Library for embedded, mobile, iot, and desktop systems
* [microrl](https://github.com/Helius/microrl) - micro read line library for small and embedded devices with basic VT100 support
* [TinyFrame](https://github.com/MightyPork/TinyFrame) - a simple library for building and parsing data frames for serial interfaces (like UART / RS232)
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### RF
* [RadioHead](https://github.com/hallard/RadioHead) - Packet Radio library for embedded microprocessors
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### MQTT
* [libemqtt 1](https://github.com/menudoproblema/libemqtt) - Embedded C client library for the MQTT protocol
* [libumqtt 2](https://github.com/zhaojh329/libumqtt) - a Lightweight and fully asynchronous MQTT client C library based on libev
* [Paho MQTT](https://github.com/eclipse/paho.mqtt.embedded-c) - C client library for embedded systems
* [liquid-fpm](https://github.com/jgaeddert/liquid-fpm) - Software-Defined Radio Fixed-Point Math Library for embedded signal processing
* [liquid-dsp](https://github.com/jgaeddert/liquid-dsp) - digital signal processing library for software-defined radios
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### Cryptography
* [wolfSSH](https://www.wolfssl.com/products/wolfssh/) - a lightweight SSHv2 client and server library written in ANSI C and targeted for embedded, RTOS, and resource-constrained environments - primarily because of its small size, speed, and feature set
* [LibHydrogen](https://github.com/jedisct1/libhydrogen) - a lightweight, secure, easy-to-use crypto library suitable for constrained environments
* [shoco](https://github.com/Ed-von-Schleck/shoco) - a C library to compress and decompress short strings. It is very fast and easy to use. The default compression model is optimized for english words, but you can generate your own compression model
* [QR-Image-embedded](https://github.com/swex/QR-Image-embedded) - QR library fork for embedded systems
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### AI ML
* [Cranium](https://github.com/100/Cranium) - a portable, header-only, feedforward artificial neural network library written in vanilla C99
* [μTensor](https://github.com/uTensor/uTensor) - TinyML AI inference library
* [Fido](https://github.com/FidoProject/Fido) - lightweight C++ machine learning library for embedded electronics and robotics
* [nnom](https://github.com/majianjia/nnom) - Neural Network on Microcontroller (NNoM) is a high-level inference Neural Network library specifically for microcontrollers
* [caffepresso](https://github.com/gplhegde/caffepresso) - an Optimized Library for Deep Learning on Embedded Accelerator-based platforms
* [libonnx](https://github.com/xboot/libonnx) - lightweight, portable pure C99 onnx inference engine for embedded devices with hardware acceleration support
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### DataBases
* [PureDB](https://github.com/jedisct1/PureDB) - a portable and tiny set of libraries for creating and reading constant databases
* [uIP](https://github.com/adamdunkels/uip) - is a very small implementation of the TCP/IP stack that is written by Adam Dunkels
* [LwIP](http://savannah.nongnu.org/projects/lwip/) - a small independent implementation of the TCP/IP protocol suite that has been initially developed by Adam Dunkels. lwIP suitable for use in embedded systems with tens of kilobytes of free RAM and room for around 40 kilobytes of code ROM.
* [mongoose](https://github.com/cesanta/mongoose) - Embedded Web Server Library. It is a multi-protocol embedded networking library with functions including TCP, HTTP client and server, WebSocket client and server, MQTT client and broker and much more.
* [libevhtp](https://github.com/criticalstack/libevhtp) - extremely-fast and secure embedded HTTP servers with ease
* [libμhttpd](https://github.com/zhaojh329/libuhttpd) - very flexible, lightweight and fully asynchronous HTTP server library based on libev and http-parser
* [Embedded-graphics](https://github.com/embedded-graphics/embedded-graphics) - a 2D graphics library that is focused on memory constrained embedded devices
* [ftk](https://github.com/prife/ftk) - gui library for embedded system
* [u8glib](https://github.com/pabigot/u8glib) - Universal Graphics Library for 8 Bit Embedded Systems
* [SGFX](https://github.com/rprata/sgfx) - a lightweight embedded library for displays and touchscreens providing everything required to build a fully featured embedded GUI
* [GUIX](https://github.com/azure-rtos/guix) - provides a complete, embedded graphical user interface (GUI) library and design environment, facilitating the creation and maintenance of all graphical elements needed by your device
* [GUILib](https://github.com/Nikolay-Kha/GUILib) - GUI library for embedded systems
* [HMI_Library](https://github.com/kgrze/HMI_Library) - Human Machine Interface suitable for embedded system
* [scmRTOS](https://github.com/scmrtos/scmrtos) - tiny Real-Time Preemptive Operating System intended for use with Single-Chip Microcontrollers. scmRTOS is capable to run on tiny uCs with as small amount of RAM as 512 bytes. The RTOS is written on C++ and supports various platforms.
* [wiselib](https://github.com/ibr-alg/wiselib) - generic algorithms library for heterogeneous, distributed, embedded systems
* [Apache NuttX Apps](https://github.com/apache/incubator-nuttx-apps) - a collection of tools, shells, network utilities, libraries, interpreters and can be used with the NuttX RTOS
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## etc
Follow this root-repo for lastest updates: https://github.com/iDoka/awesome-embedded-software