* 🔝[trezor-crypto](https://github.com/trezor/trezor-firmware/tree/master/crypto) - Heavily optimized cryptography algorithms for embedded Devices.
* [poly1305-donna](https://github.com/floodyberry/poly1305-donna) - Implementations of a fast Message-Authentication Code (8 bit, 16 bit, 32 bit and 64 bit multiplies versions).
* [tlse](https://github.com/eduardsui/tlse) - Single C file TLS 1.2/1.3 implementation, using tomcrypt as crypto library.
* [LibTomCrypt](https://github.com/libtom/libtomcrypt) - Fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines.