A number of interesting sample applications have been released for C#, VB and C++ developers over the last few months. These include
Here are links to some of the most important of these toolkits:
Below you can see a WPF application for Peer to Peer Network programming.
FIgure 2: An easy to build Peer to Peer application that allows you to chat, send file or share pictures over a network.
This developer kit has code for controlling many powerful technologies that are built into Vista:
There are also a series of Web Services that you can use to interact with popular Internet destinations
Below you can see one of the sample applications that comes with the Coding 4 Fun Developer Kit. I entered in the string "LINQ", and the application retrieved related links to books about LINQ found on Amazon.com.
Figure 1: Clicking on the links in this demo application causes a browser to be launched that shows books on Amazon.com related to LINQ.