GScreensTool
This a little screenshot tool for Windows that can take and save sceenshots from DirectX games and other applications.
Also shows FPS and time.
Press screenshot key to save a screenshot, long press to toggle interval capture mode.
Requires SlimDX (http://slimdx.org/)
Works ok with dx9, less ok with dx10 and 11. Code is a mess right now.
Based on Direct3DHook project: http://spazzarama.com/2011/03/14/c-screen-capture-and-overlays-for-direct3d-9-10-and-11-using-api-hooks