Does anyone ever found/used an ASP.NET application similar to Joomla?
I need to set up a quick and dirty CMS on a Windows Server and our client doesn't want us to use something else than ASP.NET.
I've been told by a friend that Umbraco is everything you would ever want in a CMS (and it was in the list that Nathan included in his answer). This recommendation is coming from a guy who's built several CMS solutions over the years and after taking a brief look at it, I think I'm going to try to push my clients towards using it over their current solutions.