WPF CodePlex toolkit, charting made easy...

Charting made easy: graph, pie, bars, points... 
Free, opensource, maintained.

"The WPF Toolkit is a collection of WPF features and components that are being made available outside of the normal .NET Framework ship cycle."

Sources

• Windows Presentation Foundation (WPF)

WPF: FlowDocument control

Please be aware FlowDocument control in WPF, this can easy your life when needed.

Pictures that say it all

 

The diagram shows the objects most typically used with flow content.






Sources

• WPF Flow Document For Beginners - CodeProject
• http://msdn.microsoft.com/en-us/library/aa970909.aspx

WPF: Radial Panel, custom panel

Here is a cool 'custom panel' I've found that might be very handy...
The Joy Of Programming: A Simple Radial Panel for WPF and SilverLight

Usage examples
Nicer selection menu, Clock digits, dynamic elements in radial presentation rather than list...

Example outputs

source - http://www.codeproject.com/KB/WPF/SpiderControl.aspx