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.
Main improvements in Collabtive 1.2 are security-related, so everyone should update!
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.
WebCollab is a collaborative web-based system for projects and project management; WebCollab is easy to use, and encourages users to work together.
Project management and collaboration over the internet. Features team/client sites, task assignment, document repository/work flow, gantt charts, discussions, calendar, notifications, support requests, weblog newsdesk, invoicing, and many other tools.
Feng Office is an Open Source Collaboration Platform that enables you to manage your projects and business services, collaborate with your team and your customers and organize and share documents and files.
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.
EPESI 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.
SaltOS is your Business Management solution. It integrates features like CRM (Customer Relation Management) and ERP (Enterprise Resource Planning). Moreover is it licensed as 100% free software GPL-3.0.
phpGroupWare is a fully featured, web based messaging, collaboration and enterprise management platform.