MindTouch is a Free Open Source Collaborative Platform and transforms your business with a new class of enterprise software that can hugely cuts costs, increases revenue, and provides better transparency within the organization.

Zimbra is an Ajax-based Free Cross Platform Enterprise Email Collaboration Software that integrates email, contacts, shared calendar, instant message, documents with sharing capabilities, advanced search and VoIP into a browser-based interface. The free enterprise email software is cross platform and is available for several distributions of Linux® and Mac OS® X and uses industry standard [...]

TWiki is a flexible, powerful, intuitive, and Free Enterprise Wiki Software platform, and a web application platform. The software can be used to run a project development space, a document management system, a knowledge base, groupware tool on an intranet, extranet or the internet.

The Free Business Intelligence Package of Jaspersoft includes functions such as reporting, data analysis (OLAP), and data integration (ETL). This free Business Intelligence Suite can be said to be a collection of a few tools such as the JasperServer, JasperReports, JasperAnalysis, the JasperETL and the , iReport in one powerful pack.

The Free Web Mail Software SquirrelMail was developed by Nathan and Luke Ehresmanis and features a stable, feature-packed and a fairly configurable email server. To use the software you’ll need a Web Server running PHP, and an IMAP Server to connect to.