Winamp was Designed by Nullsoft Inc.. Their trademark is a llama.

Winamp is a skinnable mp3 player, which was one of the first mp3 players to be offered to the general populace for free. Winamp also allows different types of plugins to be installed to offer different visual and audio effects.

Winamp Easter Egg (very cool):

Switch to the original winamp skin, click on the main winamp window, and type this in this exact order:

'nullsoft' hitting your Esc. key after each 'l'

Ie: n, u, l, (esc key), l, (esc key), s, o, f, t