MadShaders is a free collection of 100+ gorgeous pixel shader-based graphics demos, which also doubles as a simple video benchmark tool.

There's a swimming dolphin, flickering jack-o-lantern, Tokyo street scene, fiery star, and a host of other lovingly rendered, ultra-realistic scenes.

Run the program as a benchmark and it displays your frames per second, handy as a basic comparison of graphics speed.

Alternatively, use the option to run all the demos in succession and the program works as a sort-of manually initiated screensaver. Just leave MadShaders running and there will be something new to look at, whenever you glance at the screen.