DIY Your Galaxy LWP is basically "choose your own slightly animated space-y sprite bitmaps.
Choose backgrounds, choose sprites, choose overlays, and so on. There are dozens of combinations. Not all of them are that good of course, but there are are decent ones.
I wouldn't say it's the best ever, and the animation is not that smooth. On the other hand, it is rather unique.
Worth a download, esp. since it's free.