Winamp is an extremely popular, fast, and flexible media player for Windows. The software - which is available for free and as the $19.99 Pro version - supports pretty much every major audio and video file you can through at it, and it can be skinned for a completely new look and feel. Indeed, Winamp supports more than 10000 interface skins, 300 visualisation plug-ins and CDDB support for automatic CD audio title listing, making it the most customisable media manger on the planet. One word of warning: pay attention during the install, as Winamp will install several promotional utilities unless they are unchecked from the list.