GSAK

I have been using the trial version of GSAK for a while now and finally registered last night.  For those of you unfamiliar with it, GSAK - the Geocaching Swiss Army Knife - is a Geocaching database.  You link it to your account, and it is able to download and update cache information to a database stored on your computer.  This allows you to easily create GPX files for your GPS receiver with whatever information you require.

It has some very impressive features.  You can  define areas on a map and download just the caches in that area.  You can have it download any pocket queries that you run.  You can filter and sort by all sorts of criteria, and you can then take that filtered data and create a GPX file of it.  You get the idea.

There are also tons of macros to automate tasks, so for example, I am using a tool called FindStatGen to create a detailed cache report that I post to my Geocaching profile.  I am also setting things up so that I can download current data for about 4500 local caches (this covers pretty much anything within reasonable driving distance) that I can update once a week and keep in my Garmin.  I will be posting a tutorial on this shortly, as it's been incredibly handy.

All in all, this has been a great tool, and well worth the $30.