An XMPP server licensed under the Open Source Apache License
Openfire is a real time collaboration (RTC) server licensed under the Open Source Apache License. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber). Openfire is incredibly easy to setup and administer, but offers rock-solid security and performance.
A collaboration tool for small teams to manage tasks. Tasks are stored in a MySQL database and accessed via a web Interface provided by PHP/HTML. You'll need a web server supporting PHP and MySQL like XAMPP or a Linux Installation with Apache, PHP and MySQL.