I dont know what you can use, but if its made in Java then it will work on the PDA, and i am sure there are some PDA applications the same. I would buy a second hand or even new Tablet PC as they are great as moving maps, they can be used as a laptop by turning the screen, they are nice and bright, they have the same battery life, all Windows applications are useable. Plus you get a Laptop/PC out of it