WolfSSL is an embedded SSL Library for programmers building security
functionality into their applications and devices.

Highlights
- Up to TLS 1.2 and DTLS 1.2
- Full client and server support
- Progressive list of supported ciphers
- Key and Certificate generation
- OCSP, CRL support

Lightweight
- Small Size: 20-100kB
- Runtime Memory:  1-36kB
- 20x smaller than OpenSSL

Portable
- Abstraction Layers (OS, Custom I/O, Standard C library, and more)
- Simple API
- OpenSSL Compatibility Layer
- Long list of supported platforms

WWW: https://www.wolfssl.com/