DNN Platform (DotNetNuke) Definition DNN Platform, formerly called DotNetNuke Community Edition, is a free, open source content management system (CMS). The DNN Platform is built on the .NET framework and is designed to be easy to use, without requiring extensive programming knowledge. Features of the DNN Platform include design skins that allow the appearance of a website to be changed easily and the ability to incorporate third-party modules to add additional functionalities. Because the...