Disk benchmarking program. The program has lots of options which enables you to control various aspects of the measurement. Linux users needs GTKmm (usually already included with Ubuntu). Windows users should use the installer.
Openmark will be a Open Source benchmark that will have 32/64 bit options for video rendering tests on X11 as well as HD speed, FSB, etc benchmarks. Also many tools like: temp monitor, speed control, etc.