The strength of the Palm OS has always been its ability to help you quickly record useful data while you're on the move.
If you're a geography student or someone who wants to know precise geometric locations of different places then GeoDB will allow you to store this kind of data quickly and easily. It doesn't actually contain any information on locations of places on the Earth when you install it, but rather is a database designed specifically for recording this kind of information.
Although not particularly advanced, the GeoDB interface is very straightforward. To add a new location you just hit the 'New' button and enter the name, latitude, longitude, elevation, and GMT offset (you can omit any of this information if you want). Once stored, you can quickly categorize, search for, edit or delete the entry.
Viewing the information within GeoDB isn't particularly exciting and there's no support for maps or pictorial references. However, the main point of the program is that you can export all the data into other geographic applications such as Google Earth, when you're at a computer. Unfortunately, there's nothing within the program that explains how you can do this automatically.
If you're someone who needs to log geographic information on a regular basis then GeoDB is likely to come in very useful.