Collaborative software (also referred to as groupware or workgroup support systems) is software designed to help people involved in a common task achieve their goals. Collaborative software is the basis for computer supported cooperative work.
http://en.wikipedia.org/wiki/Groupware
Achievo is a flexible web-based free project management tool for small to medium businesses. Achievo's project management capabilities will enable organizations to support their business processes in a simple, but effective manner.
ACollab is a fully accessible, open source, multi-group, Web-based collaborative work environment. ACollab is available as a work groups addon for ATutor 1.4+ , and as a standalone collaborative work environment that will run on its own.
This bugfix release brings ... many bugfixes!
epesi BIM is free and 100% open source web application to store, organize, link and share information between people within a single business or organization. epesi has a modular design and can be easily customized and modified.
Flyspray is an uncomplicated, web-based bug tracking system written in PHP for assisting with software development. It was originally conceived when the Psi Jabber client project couldn't find a bugtracker that suited their needs, and has been made...
What is Group-Office?Group-Office suits a wide audience. It offers a very wide variety of features that matter. Features you don't need won't be installed. Group-Office stands out when it comes to user friendliness combined with powerfully features.
ProjectPier is a Free, Open-Source, self-hosted PHP application for managing tasks, projects and teams through an intuitive web interface. ProjectPier will help your organization communicate, collaborate and get things done Its function is similar to...
With Streber Freelancers and small teams can easily setup projects and keep track of tasks, issues, bugs, efforts etc. Project-User-Rights can be adjusted e.g. to provide clients a limited view of the current project state.
Tine 2.0 is an open source project, which combines groupware, CRM and ERP into one system and is therefore useful for the the whole company, from field staff to back office members.
WebCollab is a collaborative web-based system for projects and project management; WebCollab is easy to use, and encourages users to work together.