Mailpile is a webmail client with encryption and privacy features built-in. Mailpile is free and open-source software.

Gmelius is a free browser extension available for Google Chrome, Mozilla Firefox and Opera that customizes the look and feel.

OX Open-Xchange is a web-based communication, collaboration and office productivity software.

cPanel is a Linux-based web hosting control panel that provides a graphical interface and automation tools designed to simplify the process of hosting a web s…

SOGo (Scalable OpenGroupware.org) is an open source collaborative software (groupware) server with a focus on simplicity and scalability.