Aside from numerous add-ins, I've also released several bits of code to make general add-in development easier, these projects include:
First posted about on the WHS forums several months earlier and then updated for WHS Dev Tip #7, Test Loader is a simple application that loads Home Server add-ins into a test environment has similar loading rules and mechanisms as the Home Server Console, all allowing a developer to more easily test their add-in both visually and mechanically, while separete from any actual Home Server.
As part of WHS Dev Tip #4, using these project templates, developers can now create a Windows Home Serve add-in almost as easy as they can a new Windows application with the File -> New menu sequence, specifying a name and coding.
As beneficial as the official online SDK Documentation is, it is not accessible in a form that developers are used to: Intellisense when writing their code.
As part of WHS Dev Tip #3 a pair of XML documentation libraries were created which provide most of the same type and argument information to the developer as is available online.