ArtWeb - Leading website for artists; create easy and free websites for your art. Artists web page template.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
DeviantArt - deviantART was created to entertain, inspire, and empower the artist in all of us.
Anchor CMS - Free and lightweight blogging system
CGSociety - Community for Computer Graphics artists
Textpattern - Textpattern is an elegant content management system that is free, open source software.