Sharepoint Community Kit is a project which contains alot of added value features for sharepoint 2007.
"The Community Kit for SharePoint is a set of best practices, templates, Web Parts, tools, and source code that enables practically anyone to create a community website based on SharePoint technology for practically any group of people with a common interest.
New added features...really cool features:
Enhanced Blog Edition
Enhanced Wiki Edition
Corporate Intranet Edition
User Group Edition (1.0)
Home Owners Association Edition
External Collaboration Toolkit for SharePoint (Community Edition)
read more & download it now :