협업 소프트웨어 또는 그룹웨어 제품군.
- Citadel/UX - Collaboration suite (messaging and groupware) that is descended from the Citadel family of programs.
- EGroupware - Groupware software written in PHP.
- Horde Groupware - PHP based collaborative software suite that includes email, calendars, wikis, time tracking and file management.
- Kolab - Another groupware suite.
- SOGo - Collaborative software server with a focus on simplicity and scalability.
- Zimbra - Collaborative software suite, that includes an email server and web client.