GCTool is a must have Geocaching toolkit. It is developed for assisting Geocachers in solving geometrical problems and common mystery puzzles. The toolkit provides accurate solutions for diverse geometrical problems and is able to analyse both text and numbers. GCTool is developed by Gpsgek and is free to download.
January 22, 2009: Version 1.6.1 is available for download.
GCTool is FREE to download and use for non-commercial purposes.