SecureBlackbox
- Delphi/Kylix component and ActiveX/DLL library [Commercial]
- http://www.eldos.com/sbb/

Yet Another SSL
- 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

MatrixSSL - Open Source Embedded SSL
- 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

RSA BSAFE
- 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

Java Secure Socket Extension
- Sun's official extension for SSL communication in Java. API allows third party library being used as a provider.
- http://java.sun.com/products/jsse/

GNU TLS
- An Open Source implementation of TLS 1.0 Internet protocol as described in RFC2246. [GPL]
- http://www.gnu.org/software/gnutls/

SSL Library
- Java Library. Implements SSLv3 and backward compatible SSLv2. [Open Source]
- http://ssllib.sourceforge.net/

Claymore PureTLS
- Java SSL Implementation. Supports SSLv2, SSLv3, TLSv1. Uses Crypto library from Cryptix. [Open Source]
- http://www.rtfm.com/puretls/

Network Security Services libraries
- 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/