GeoToad is a tool for serious geocachers. It lets you make advanced queries to find the perfect caches to hit on your day out, and export them to any imaginable format. Here is what it can do on-demand queries for geocaches based on 15 different constraints: query type, distance, difficulty, terrain, fun factor, size, type, unfound, trackables, cache age, last found date, title, description, found by, cache creator. The outputs cache listing and details to HTML, GPX, CSV, VCF, Text, Ozi, MXF, Tiger, and GPSPoint. It is integrated with GPSBabel to output to Google Earth (KML), and dozens of other formats.