warmluft

Warmluft is a program to help testing a computer's cooling system. The program logs the CPU temperature while generating CPU load.

The resulting log files can be visualized by tools like gnuplot:

This picture shows the effect that a little bit of compressed air can have on a laptop's cooling system.

You may want to verify the signature or have a look at the release notes. If you are interested in versions other than the current release, you can check the list of all releases.