http://www.das-wherigo-handbuch.de/ Whereio Handbuch
http://webwigo.net/# Online-Player
https://gc.de/gc/reversewherigo/ Online Reverse-WIG Solver
https://myosmc.hopto.org//GeoCache/geo/ WIG-Cracker
https://wigcrumbler.team-hildesheim.de/ WIG-Crumbler