A city guide to public transportation and attractions spanning the world. It can be downloaded or used online and it is free.
(via PocketPC Mag)
Be prepared when you go shopping for a MP3 player or notebook with the handy (literally) advice from the experts. More on how to use it here.
(via Dave's iPAQ)
The Top 15 PDA Resources for Family Physicians. FPM, July/August 2006.