OT: Useful PDA software

Hello all, I'm new to NANOG, and I'm just getting started in the field. My question is simple, can anyone recommend some good software for my handspring Visor? I was hoping to find sw that could keep track of networks, time spent on projects, and well anything that the pros find useful. Any input is much appreciated. Please repley off list as I don't want to add more OT clutter to the list. Thanks Frank S. ftsuraci@hcrn.com