1. DotNetNuke

Of all the ASP .NET CMSes out there, DotNetNuke is probably the most well known and popular. One of the reasons for the popularity of this CMS is due to its multiple versions which allow for the flexibility to accommodate a beginning web developer, a small to medium sized business, or even a large enterprise. It has enjoyed a busy development since before 2003 that continues to this day.

For those that don’t need much support other than what the open source community can provide, there’s the DotNetNuke Community Edition offered under the BSD License. It contains most of the features which comprise the other editions, but the support is left up to the community. The Professional Edition gives you support from the DotNetNuke Corporation along with a few more features, and for a (much) increased price, the Enterprise Edition gives you a few more features along with phone support.

This CMS has been around for a while, so it’s very stable and there’s a plethora of add-ons in the community, so it’s definitely the first stop if you’re looking for something that’s proven.