where can i download the sense ui ported for motorola droid?
it has been ported a couple of months back.
see here: HTC Sense UI ported to the Motorola DROID as Android nerds weep with joy Boy Genius Report
what ui is better than sense and what do you like to use with the moto droid?
Launcher Pro and ADW (both available in the market) are your two best options. Both have very similar features, so you should just try both out and see which one you prefer. They are both free and are constantly receiving updates.