LibreSSL
LibreSSL is a fork of OpenSSL with a heavily refactored codebase. The goal of that refactoring is the removal of dead code and the hardening of insecure code. It provides the libraries crypto(7) (a.k.a. libcrypto), ssl(7) (a.k.a. libssl), and tls(7) (a.k.a. libtls). It also provides the utility openssl(1).
Usage
See OpenSSL.