DotNetNuke is an open source web application framework written in VB.NET for the ASP.NET framework.open source projects out there today DotNetNuke has an avid following of hundreds of thousands of users. The benefits of using this system is the rapid updates to the platform and the intense support you will receive from it community. These are two very important factors when considering an open source system, the level of updates and the support you will receive from its creators or users of the platform. Further the innovations that are built into this system make it one powerful application by any measure. For instance the skinning mechanism is by far one of the easiest to modify and customize and the scheduling processor reduces some of the more mundane tasks of maintaining any website.