Apache is a free and open-source cross-platform web server software.
ClustrMaps widget is a visitor tracker, designed for general web and blog use.
mod_wsgi is an Apache HTTP Server module that provides a WSGI compliant interface for hosting Python based web applications under Apache.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.
Python is an interpreted and general-purpose programming language.