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]

An Open Source implementation of TLS 1.0 Internet protocol as described in RFC2246. [GPL]

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)

Java SSL Implementation. Supports SSLv2, SSLv3, TLSv1. Uses Crypto library from Cryptix. [Open Source]

MatrixSSL is an open source embedded SSL implementation under 50K. It is designed for small footprint devices and applications requiring low connection overhead.

The yaSSL software package is an open source, dual licensed implementation of SSL. It includes SSL client libraries and an SSL server implementation.

Delphi/Kylix component and ActiveX/DLL library [Commercial]

Java Library. Implements SSLv3 and backward compatible SSLv2. [Open Source]