The Virtual Collaboratory provides mechanisms for users to exchange information, data, on-line resources, and ideas. In a collaboratory, individuals from different locations are able to work together using VoIP, document exchange and other features
PAFlow is an open source document tracking system. The project is sponsored by the AIPA (Italian Authority for the Information Technology in the Public Administration) and it is carried on by Icube, an open source company in Pisa, Italy.
Amphora Light is a Web-based groupware server written in Python and Zope. It offers basic office functionality: document sharing, calendars, tasks, contacts, internet databases in the context of a hierarchical organization and flexible access rights.