http://www.pagehosting.co.uk/rf/ for refresh force.
there are others. some drivers even include options to force the refresh rates; as well some general multi-purpose apps like Rivatuner also do.
basically, in order to "protect the customer's monitor", microsoft forces all direct3D games to run at 75hz, which isn't so bad at least. However, due to the obviously extremely dangerous nature of the competing OpenGL API, microsoft forces OGL games to run at 60hz...
yup. why is no one surprised?