DeskPins - DeskPins can be used to make any application topmost, that is, to keep it above all other windows.
WindowTop - Easly set any window on top, just move the mouse to the top area of the window.
Skybn Window On Top - Window on Top can be used to make any application topmost,that is to keep it above all other windows.
Stay On Top - Set a window to stay on top with this single-function but handy application.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
MocapX - Facial Motion capture app Maya and iPhone. With the MocapX animator, you can easily use the iPhone camera to animate characters in real time directly in Maya. MocapX tools enable you to use any custom or production rig as well as any Maya feature.