I have been using Pocket Music from
http://www.pocketmind.com/
since the second day I have had my AX and I have been pretty pleased with it. It is a free download and there is an upgrade for about $20 if you really feel the need for a prettier interface.Anything free will be a little less than beautiful but the quality for the price is excellent. Some may say I am cheap (wife) I prefer to think of it as extensive field testing and doing a service to my fellow humans by throughly testing every free application I can find.
:D