Fraps 2.2.0 - lets you monitor current framerates in-game
 

Fraps is a tool that lets you monitor current framerates in a corner of the screen for programs using DirectX or OpenGL technology. It also allows you to easily take screenshots of games, make movies of gameplay, and manually determine the average framerate between two points.


* Requires Direct X 9.0b or later
* Requires an Intel Pentium 3/4, or AMD Athlon/Duron processor
* Works best with an NVIDIA Geforce or ATI Radeon graphics card.
* Install under an Administrator account.

http://www.fraps.com/download.htm