I am kind of surprised why this app hasn't found its way in this collection, its already portable freeware (you are questioned during the install process if you want it portable) and way better than every player I ever tested (even coolplayer). Here some features.
Extremely fast (even on old computer)
Extremely fast well structured library
very low resource consumption
good Tag editor
very intelligent and adaptive play-lists
cross fading
pretty good DSP Manager (for example karaoke function)
quite good equalizer included
plug ins available like Last.fm integration
other nice features like the jump to key commands in winamp (key commands can be changed)
multilingual
pretty good task-bar integration
...waiting for some comments
sea