Blog: WordPress/Lyceum (http://wordpress.com/ and http://lyceum.ibiblio.org/) - vote for it

Bookmark Manager: ol'bookmarks (olbookmarks.sourceforge.net) - implemented

Clan Management: vWar (www.vwar.de) - vote for it

CMS: TYPO3 (Frontend) (www.typo3.com) - implemented

CMS: TYPO3 (Backend) (www.typo3.com) - implemented

Mailing List Manager: Mailman (www.list.org) - vote for it

Mailing List Manager: Sympa (www.sympa.org) - vote for it

Photo Gallery: Gallery (gallery.menalto.com) - vote for it

Photo Gallery: 4Images (www.4homepages.de) - implemented

Project Management: dotProject (www.dotproject.net/) - implemented

Project Management: Achievo (www.achievo.org) - vote for it

Social Networking: Drupal (drupal.org) - vote for it

Social Networking: Ellg (elgg.org) - vote for it

Survey System: SMT (www.surveyworld.org) - vote for it

Wiki: Mediawiki (www.mediawiki.org) - implemented

Wiki: Confluence (confluence.atlassian.com) - vote for it

OASIS (oasis.sourceforge.net) -  vote for it

Bea Weblogic (www.bea.com) - vote for it

Horde [without IMP - see below] (www.horde.org) - vote for it

IBM Websphere (www.ibm.com/websphere) - vote for it

Bugzilla (www.bugzilla.org) - vote for it

Eventum (eventum.mysql.org) - implemented

Mantis (www.mantisbt.org) - implemented

OneOrZero (www.oneorzero.com) - vote for it

OTRS (otrs.org) - implemented

RT: Request Tracker (http://www.bestpractical.com/rt) - vote for it

Burning Board (www.woltlab.de) - implemented

FUDforum (www.fudforum.org) - vote for it!

Invisionboard (www.invisionpower.com) - vote for it!

phpbb (www.phpbb.com) - implemented

SMF (www.simplemachines.org) - vote for it!

vBulletin Board (www.vbulletin.com) - implemented

SugarCRM (www.sugarcrm.com) - implemented

OWL (owl.sourceforge.net) - implemented

Claroline (www.claroline.net) - implemented

Moodle (www.moodle.org) - implemented

eGroupware (www.egroupware.org) - implemented

Open-Xchange (www.openexchange.com) - vote for it

Interchange (www.icdevgroup.org) - implemented

osCommerce (www.oscommerce.com) - implemented

Cacti (http://www.raxnet.net/products/cacti) - implemented

- Cacti is a frontend to RRDtool (http://people.ee.ethz.ch/~oetiker/webtools/rrdtool) -

Nagios (www.nagios.org) - not suitable (uses Basic Authentication)

SysCP www.syscp.de) - vote for it

Webmin www.webmin.com) - vote for it

phpopenchat (phpopenchat.org) - implemented

hivemail (www.hivemail.com - vote for it!

Open Webmail (openwebmail.com) - implemented

RoundCube Webmail (www.roundcube.net - vote for it!

SquirrelMail (www.squirrelmail.org) - same as horde (but maildir support announced)

Horde IMP (www.horde.de) - not only web server logon, but also a logon to an IMAP server behind. Thus more then pure web single sign-on, out of scope here. May be covered by a future version; see "What's so special about Horde Webmail?" in the FAQ. If you are seriously interested, please contact us!