I really like the live earth. The developer is adding stuff almost every other day. It has the orbiting moon now, which is very neat, very 3-d. Bucketload of settings as was posted.
For listening to music I like the stock vu meter/synthesizer combo. Real retro for you older farts like me.
The fireworks are fun to show folks. My wife really likes that one, and it is interactive in that you can press the screen and get a firework in the general vicinity of the press.
I found a bunch by just typing in "live" as a market search. But, you have to be running a 2.1 rom, or have modified your build.prop file so market thinks you are running a 2.1.