OpenSSL

OpenSSL is an open source implementation of the SSL and TLS protocols. The core library (written in the C programming language) implements the basic cryptographic functions and provides various utility functions. Wrappers allowing the use of the OpenSSL library in a variety of computer languages are available.

Versions are available for most Unix-like operating systems (including Solaris, Linux, Mac OS X and the four open source BSD operating systems), OpenVMS and Microsoft Windows. IBM provides a port for the System i (OS/400). OpenSSL is based on SSLeay by Eric A. Young and Tim Hudson, development of which unofficially ended around December 1998, when Tim and Eric both started to work for RSA Security.

Not OpenSSH

OpenSSL provides socket communications with SSL and TLS encryption, not SSH. Even though SSH implemented SSL and TLS encryption, SSH is a different product and protocol. With hours of work you can use OpenSSL to talk to a SSH server, however, there are SDKs out there to make that task much easier.