WIKI-OS
WIKI-OS.org is the World's only open-source web OS where anyone can contribute right away like a wiki. Includes an online IDE to develop .NET WPF applications collaboratively.

ScriptCommander
ScriptCommander is a free, downloadable WPF application that designs multi-cultural Silverlight 2.0 video shows for sales, marketing and training.

Parrot Backup
Parrot Backup has a unique user interface that, instead of menus, wizards, and dialog boxes found in a traditional backup application, allows users to directly manipulate the files and folders they wish to backup.

WMV Cut & Split
Cut & split WMV without reencoding, in the fastest time and in the best quality. Uses two-pass encoding when cutting at non-key frames. You can step forward and backward to find exactly where to cut.

Telerik WPF Rad Grid
The application demonstrates the rich capabilities of RadGridView and also shows how Telerik WPF grid, tab, chart and hierarchy child template are bound together to accomplish a complex application scenario.

ProjectGoo
ProjectGoo leverages WPF in the client form factor, in the grid (Xceed), in the charts for analytics (Visifire). Fast iteration possible with XAML and WPF.