GSAK stands for Geocaching Swiss Army Knife and is a very popular piece of waypoint management software. Major features include:
- Ability to store waypoints on your computer and download them to your GPS
- Multiple databases
- Conversion to many mapping formats
- HTML output
- extensive searching
- macro support
- backup and restore
- distance/direction from other waypoints (including caches, locations, post codes) and much more.
- Pocket Queries on Geocaching.com. This is a Premium member service on that website. A Pocket Query is only going to provide geocaches that are initially listed on that site. It will give you a large part, but not necessarily the whole picture of geocaching in your area.
- Geocaching Australia GPX files which are free and available by selecting "Find > Available Caches", and then choosing a state. Presently, there is a small link on the bottom right of the page with the GPX file.