Read about Sage here: http://kiserai.net/adom/sage/
I'm not sure how good other features but these ones are AWESOME:
- Automatic switching of places with non-hostiles
- controlled teleport to stairs ('>'/'<')
- quick-set the dynamic display ('Alt-S', 'Alt-E', 'Alt-G', 'Alt-T', 'Alt-A') (I always forget the key which switches the dynamic display so did not use that feature much. With more sensical keyboard shortcut I could use it more often!)
- Auto calculate weapon damage.
Did anyone request something from this list before? Calculate weapon damage is the best.