Overview of OWIN and Katana

As OWIN is becoming popular and more common, it is important for ASP.NET developers to understand what OWIN and Katana are. ASP.NET Web API and ASP.NET Identity are already geared towards using these specifications. To that end this article explains what OWIN and Katana are and how they fit into the whole web development picture for ASP.NET developers. You will also develop a simple application to get a code level understanding of these features.

http://www.binaryintellect.net/articles/7a43f085-6c44-47d8-ac9e-9652385b67ed.aspx