A basic human animator. Click and drag segments or drag sliders to change the angles.
Use Ctrl/Cmd + Z to undo, and Ctrl/Cmd + Y to redo.
You can use comma and period to step backward or forward one frame, respectively.
The pivot points on the knees are messed up, sorry...And the "Show Wireframe" button does nothing (it used to do something).
I'll write a better description later.