WhereYouGoClone of the unmaintained repository (biylda/WhereYouGo) to continue app development
GpsPruneGpsPrune is a map-based application for viewing, editing and converting coordinate data from GPS systems.
GClhGC little helper II - Some little things to make life easy (on www.geocaching.com). Powerful, configurable tool to improve and expand the geocaching pages.
Geocaching4LocusA Locus simple add-on allows you to download and import caches directly from Geocaching.com site.
gc-gpx-viewerGeocaching GPX Viewer is a web app to display caches from a gpx file on a map.