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Open Source Cryptographic Libraries

Products which are available under some form of Open Source license, and which may also be available under some form of commercial license.

Open Source Cryptographic Libraries

Library	Description
Botan	a C++ cryptography library which includes a TLS implementation
Bouncy Castle	cryptography API for Java and C#
Cryptlib	a security toolkit that allows one to easily add encryption and authentication services to software
Crypto++	a free C++ class library of cryptographic schemes
GnuTLS	an LGPL-licensed TLS library with substantial documentation
LibTomCrypt	public domain open source crypto library written in C
NaCl	NaCl (pronounced "salt") is a easy-to-use high-speed software library for network communication, encryption, decryption, and signatures
NSS	a set of libraries designed to support cross-platform development of security-enabled client and server applications
PolarSSL	an SSL library that handles the complexities of the Secure Sockets Layer (SSL) protocol for an application
XySSL	a C library providing a very small footprint crypto library and SSL implementation.

Open Source Products Using OpenSSL

Products which are available under some form of Open Source License, and which may also be available under some form of commercial license.

Open Source Products Using OpenSSL

Product	Description
libevent	an event driven library which can optionally use OpenSSL
mod_ssl	SSL/TLS module for the Apache HTTP Server
Stunnel	an SSL encryption wrapper between remote client and local (inetd-startable) or remote server

Closed Source Cryptographic Libraries

Closed Source Cryptographic Libraries

Library	Description
No Entry	This is a placeholder

Closed Source Products Using OpenSSL

Closed Source Products Using OpenSSL

Product	Description
No Entry	This is a placeholder

Books and Documentation

Books and Documentation

Title	Description
Comparison of TLS implementations	Wikipedia article comparing various TLS libraries
keylength.com	site which summarizes various key length recommendations
OpenSSL Cookbook	A free ebook that covers configuration and command-line usage (first published in 2013; continuously updated)
Network Security with OpenSSL	O'Reilly book from 2002