GoldWave 5.23 has a MaxMatch and
of editing options. It isn't multi-layed out like Audacity, it's a little more complex, but if you want to match volumes, it may help.
Only annoying thing is that every time you load it you get 150 commands without interruption. After that it pops-up asking to register. Outside of that, it is A-MAZING stuff. Has a lot of pre-sets, easily changed options and lots of effect tools, volume editors, voice-editing software, equation-based sound effects. It's powerful as hell.
(Promise it's a good site: GoldWave Website