Collaborative effort to develop a full-featured, and Open Source toolkit implementing the secure sockets layer (SSL v2/v3) and transport layer security (TLS v1) protocols. http://www.openssl.org
NSS implements SSL v2 and v3, TLS, PKCS#5, PKCS#7, PKCS#11, PKCS#12, S/MIME, X.509v3 certificates, and other security standards. These libraries are used by Mozilla / Netscape Communicator and server products. [Open Source] http://www.mozilla.org/projects/security/pki/nss/
It includes everything needed for delivering SSL-enabled applications developed in C, C++, or Java. It is not subject to US export control. [Commercial] (RSA Data Security) http://www.rsasecurity.com/node.asp?id=1202
MatrixSSL is an open source embedded SSL implementation under 50K. It is designed for small footprint devices and applications requiring low connection overhead. http://www.matrixssl.org
The yaSSL software package is an open source, dual licensed implementation of SSL. It includes SSL client libraries and an SSL server implementation. http://www.yassl.com