Kevin Moore (formerly a PM on the WPF team) published a really great set of utilities and demos he called the "WPF Bag of Tricks". Despite my ongoing interest in WPF, I was unaware of where to find this up until recently, and in my own unscientific polling, many of the WPF enthusiasts amongst the ISVs I work with were unaware of it as well.
I'd like to help remedy that.
You can find the WPF Bag of Tricks up on http://j832.com/bagotricks. Therein, you'll find some nice general purpose and specialized samples suitable for reuse in your apps and complete with source code and the right to reuse it, including:
- a handy calendar and date picker control
- a nice graph (of the node and edge variety) explorer
- a great demo of how to do interactive 3D using the new WPF 3.5 features
- a whole bunch of other general goodness
I hope Kevin will continue with this, but regardless, I think you'll benefit greatly from checking out what they make possible for WPF.