Wrike
Freemium
Wrike is an online project management software that gives you full visibility and control over tasks.
Baïkal
Open Source
Baïkal is a Cal and CardDAV server, based on sabre/dav, that includes an administrative interface for easy management.
taskblitz
Freemium
taskblitz is set of tools to collaboratively get your work done including project management, chat, time tracking and invoicing.
Teamwork Projects
Commercial
Teamwork Projects is a project management app.
dapulse
Commercial
Dapulse is a smart collaboration and communication app you can use to get your team members working in sync in one place.
Hive.com
Commercial
Hive.com is a productivity platform with powerful project management features.
Compare SOGo with alternatives
Compare Teamwork Projects and SOGo and decide which is most suitable for you.