I think you'll find a KMA to MP3+G conversion tool at
www.tricerasoft.com - I think it was them that invented the KMA format originally.
Don't get me wrong though...for everything else, you can't beat the MTU software. I've looked at other programs (from people like TriceraSoft) and none of them are as easy to work with as MTU. Generally speaking, the only time I use anything else is when I need to do something that MTU can't.