Alternatives and similar repositories for mbedtls:

Users that are interested in mbedtls are comparing it to the libraries listed below

• wolfSSL / wolfssl
  The wolfSSL library is a small, fast, portable implementation of TLS/SSL for embedded devices to the cloud. wolfSSL supports up to TLS 1…
  ☆2,411Updated this week
• libtom / libtomcrypt
  LibTomCrypt is a fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well know…
  ☆1,621Updated this week
• zserge / jsmn
  Jsmn is a world fastest JSON parser/tokenizer. This is the official repo replacing the old one at Bitbucket
  ☆3,764Updated 8 months ago
• littlefs-project / littlefs
  A little fail-safe filesystem designed for microcontrollers
  ☆5,404Updated last week
• eclipse-threadx / threadx
  Eclipse ThreadX is an advanced real-time operating system (RTOS) designed specifically for deeply embedded applications.
  ☆3,039Updated last week
• nanopb / nanopb
  Protocol Buffers with small code size
  ☆4,503Updated last month
• littlekernel / lk
  LK embedded kernel
  ☆3,291Updated last month
• kokke / tiny-AES-c
  Small portable AES128/192/256 in C
  ☆4,411Updated 4 months ago
• randombit / botan
  Cryptography Toolkit
  ☆2,833Updated this week
• madler / zlib
  A massively spiffy yet delicately unobtrusive compression library.
  ☆5,977Updated this week
• c-ares / c-ares
  A C library for asynchronous DNS requests
  ☆1,917Updated 2 weeks ago
• u-boot / u-boot
  "Das U-Boot" Source Tree
  ☆4,266Updated this week
• lwip-tcpip / lwip
  lwIP mirror from http://git.savannah.gnu.org/cgit/lwip.git
  ☆1,152Updated 2 weeks ago
• HardySimpson / zlog
  A reliable, high-performance, thread safe, flexsible, clear-model, pure C logging library.
  ☆2,302Updated 3 months ago
• google / sanitizers
  AddressSanitizer, ThreadSanitizer, MemorySanitizer
  ☆11,777Updated 3 weeks ago
• protobuf-c / protobuf-c
  Protocol Buffers implementation in C
  ☆2,745Updated last week
• FreeRTOS / FreeRTOS
  'Classic' FreeRTOS distribution. Started as Git clone of FreeRTOS SourceForge SVN repo. Submodules the kernel.
  ☆5,688Updated this week
• kmackay / micro-ecc
  ECDH and ECDSA for 8-bit, 32-bit, and 64-bit processors.
  ☆1,284Updated 3 months ago
• obgm / libcoap
  A CoAP (RFC 7252) implementation in C
  ☆820Updated this week
• libffi / libffi
  A portable foreign-function interface library.
  ☆3,293Updated last week
• akheron / jansson
  C library for encoding, decoding and manipulating JSON data
  ☆3,137Updated 6 months ago
• libevent / libevent
  Event notification library
  ☆11,344Updated 2 weeks ago
• eclipse-paho / paho.mqtt.c
  An Eclipse Paho C client library for MQTT for Windows, Linux and MacOS. API documentation: https://eclipse-paho.github.io/paho.mqtt.c/
  ☆2,022Updated this week
• weidai11 / cryptopp
  free C++ class library of cryptographic schemes
  ☆5,015Updated 6 months ago
• tass-belgium / picotcp
  PicoTCP is a free TCP/IP stack implementation
  ☆1,212Updated last year
• FreeRTOS / FreeRTOS-Kernel
  FreeRTOS kernel files only, submoduled into https://github.com/FreeRTOS/FreeRTOS and various other repos.
  ☆3,031Updated last week
• DaveGamble / cJSON
  Ultralightweight JSON parser in ANSI C
  ☆11,153Updated 4 months ago
• warmcat / libwebsockets
  canonical libwebsockets.org networking library
  ☆4,891Updated last week
• civetweb / civetweb
  Embedded C/C++ web server
  ☆2,983Updated last month
• crosstool-ng / crosstool-ng
  A versatile (cross-)toolchain generator.
  ☆2,207Updated this week