The first project I published was LightWpfControls, it's the start of a collection of WPF controls.
The first control in the collection is what I choose to call a tracker. A tracker is what I would call a two dimensional slider control. I spent quite some time to find, using search terms like "2D Slider", "track pad", "joy stick" and many more. But I struck out, so I ended up creating one my self.
|There is two different shapes of the tracker square and circular.|
The project can be found here: LightWpfControls