Collaboration Suites

Zimbra, 
Habl's business partner, is an open source server and client technology for next-generation enterprise massaging and collaboration. Zimbra delivers innovation for both the administrator and the end-user as well as compatibility with existing infrastructure and applications, both open source and proprietary.

PHP Group Ware

Php Group Ware is a fully featured, web based messaging, collaboration and enterprise management platform.
 Php Group Ware comes with over 50 applications that can be mixed and matched according to your needs. Some of the most powerful features are Contact Management, Email, Shared Calender, Web Content & Document Management & Sharing, Project Management, Issues Tracking.

E Group Ware

E Group Ware is a free open source group ware software intended for businesses from small to enterprises. Its primary functions allow users to manage contacts, appointments, projects and to-do lists.