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Please feel free to edit this page and add your own OpenSSL-based project or product. This is the one place where otherwise extraneous mention of commercial products is appropriate. Note such mention does not constitute endorsement per our Commercial Product Disclaimer.

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
AmiSSL an OpenSSL port to AmigaOS
Botan a C++ cryptography library which includes a TLS implementation
BoringSSL a Google fork of OpenSSL (Announcement )
Bouncy Castle cryptography API for Java and C# (Wikipedia: Bouncy Castle (cryptography))
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
LibreSSL an OpenBSD fork of OpenSSL (Press coverage: ZDNet, Ars Technica)
LibTomCrypt public domain open source crypto library written in C
miTLS a verified reference implementation of the TLS protocol. ("reddit: miTLS - A verified reference TLS implementation")
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 (Wikipedia: PolarSSL)
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

Languages libraries/Wrappers relying on openssl

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

Even if this section is empty now, it exist a numerous number of closed source products using OpenSSL.

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