Software to build open source communities

I wonder why there is no real "community" software out there for open source software projects, especially if you want to have an integrated experience for a user.
If you look at big open source projects you have a diverse set of tools used for the websites. I compiled the following table based on looking at hints within the page or the page source codes, so it might be not correct:

Tool	Issue-Tracking	Site-CMS	Forum/Mailinglist	Wiki	Blog	SourceCode/Binaries
Spring Framework	JIRA	Drupal	vBulletin/Mailinglist was at sourceforge but is retired	-	Wordpress	SourceForge
Hibernate	JIRA	coWiki	phpBB/mailman	(coWiki)	Seam based	JBoss/SourceForge
Apache (Struts)	JIRA	Maven-Generated	-/apache-mailinglists	Confluence	-	Apache
AppFuse	JIRA	Confluence	Nabble webinterface to mailinglist/via dev.java.net	Confluence	Confluence-News	java.net
SugarCRM	-	Mambo	vBulletin	MediaWiki	-	SourceForge
Sourceforge	own module	-	own/own	-	Only News-Function	SourceForge

Beside JIRA being the de facto standard for issue tracking, the rest is a bit of a mess, and most of the selected open source communities are in the Java area. So what tools would you recommend for starting an open source project/community?
Currently I am looking at Confluence, Drupal, JIRA, TikiWiki and Trac. I guess we will have to use more than one tool to cover all, but I will try to limit it to as few tools as possible.
Any thoughts/help?