You are at the track with your friends, and don't want to fiddle with a notepad. You pull out your phone and mark up (Disc) Golf points with a single button using your MIDP or Mobile Linux phone. If this sounds good, DiscGolfer is for You.
Virtual telescope written in Java for mobile phones. Uses CLDC1.1 and MIDP2.0. Tested on mobile phone with 2MB RAM and 60MB storage. The largest catalog uses TYCHO2(2.5M stars) and NGC+ IC(13k DSO) .Sky plotted in dark red. Has desktop version also.