Citadel.org
Tine20.org
Egroupware.org
Group-office.com
Zimbra.com
Open-xchange.com
Scalix.com
Collax.com
Norada.com
Informationgateway.org
Teamwox.com
Desknets.com
Tmwox.net
01.com
Teamwox.net
Tmwox.com
Weboffice.com
Firstclass.com
Communityzero.com
Horde.org
Phprojekt.com
Zarafa.com
Doodle.com
Keepandshare.com
Cozi.com
Scheduleonce.com
Shiftboard.com
Whosoff.com
Whenisgood.net
Bluetie.com
Timebridge.com
Arcasolutions.com
Presdo.com
Same-page.com
Calconnect.org
Daypilot.org
Ajaxavailabilitycalendar.com
Nuxeo.com
Brownbearsw.com
Schooltool.org
Alfresco.com
Liferay.com
Question2answer.org
Sakaiproject.org
Gitlabhq.com
Precurio.com
Cynapse.com
Opengroupware.org
Openchange.org
Blue-mind.net