Programs that make the world go round

Pc Probe
This monitors the temperature of my cpu, motherboard and fanspeed. It is nice to know if your computer has a fever.
It plays music and music is all you need. If you're a harmonium.
A handy clock in all respects. It shows cpu and ram usage as well as being a prettier alternative to the drab windows clock that doesn't even tell you the vital things you need to know.