GROUP-E project is collaboration software which integrates groupware, project management, and business server on one platform.

Group-Office is a Web-based office suite written that is extensible with modules.

Sciret is an advanced knowledge based system.

Simple Groupware is a complete groupware package.

Instant OGo is a Linux-based groupware server distribution.

QueWeb is a web-based Customer Care solution for industries that sell technically complex products and services.

Adaptive Planning is the leading provider of collaborative performance management solutions.

CuteFlow is a Web-based document circulation tool.

Zimbra is a server and client technology for enterprise messaging and collaboration.

OfficeSpot.Net Collaboration Server project contains all packages needed to get eGroupWare running easily.

OrangeHRM comes as a comprehensive solution for the efficient management and development of your Human Resource.

OpenChange is an implementation of Microsoft Exchange under Unix platforms.

Gnumeric is a powerful and easy to use spreadsheet using GNOME.

KONSEC Kolab Server is a highly scalable, cluster-capable messaging and collaboration server.

Inmersa is a complete and integrated back and front office solution.

KMobileTools is a nice KDE-based application that allows to control mobile phones with your PC.

TaskFreak! is a simple but efficient web based task manager written in PHP.

Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Nag is a Web-based application which provides a simple, clean interface for managing online task lists.

]project-open[ is an open-source based project management system.

Addre'sh' Book is a (basic) Address Book implemented entirely in Shell Scripts.

Khalkhi cards allows you to have cards of the entries in your addressbook floating on the desktop.

Khalkhi framework was formerly known as Contacts framework.

Zarafa software allows you to share Outlook email and calendars.

Bonita is a flexible cooperative workflow system.