If you're looking at giving DotNetNuke 6 a test run and want some simple, lightweight free skins, then check out http://www.dnnskins.com.
We've built a cool new directory for users and you can search, preview and rate these skins. Only for DNN 5 skins at the moment and now a quicker and easier way to download your favourite skins.
All skins are visible and the download link is there when you log in.
This portal is our preview location for all that we offer, commercial, free, and converted skins. Each skin has a working example of the pages, with the commercial versions linking to where they can be purchased.
This is a DNN 5.5.1 build with some graphical and css mods that we implemented to make it prettier and ensure compliancy on skins that are deemed to be 'compliant'.