[H] Music mixing app

[joeuser]

Ok, here's a dilly... I have a client and her daughter coaches the local 
cheerleaders (yes, it's good to be me). Anyway, she wants me to mix some 
MP3's for their routines... I used to mix a little back when vinyl was 
still alive (barely). I was wondering if there was an app (free or REAL 
cheap) that can allow me to mix (maybe count my BPM since I don't have 
my counter anymore) and adjust pitch, speed, volume sedgeway etc etc...

This is charity work so any help would be appreciated... Who'd charge 
for this *honor* anyway ;P

LOL!

TIA


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Cheers,
joeuser (still looking for the 'any' key)