The only things I can think of are:
WavePad, great program to edit and convert audio files without to much hassle, cut annoying sounds out or edit a song to make it you ringtone for example...
AlienGUIse Desktop Theme Manager, an absolutely free desktop theme manager with 4 different themes and icon packages, looks very cool and is very easy to use...
I use AVG, is it just as good as Avast Antivirus?