ForeRunner X01 toolkit provides an easy access to Forerunner 201/301/305/305E GPS-units. There are multiple command line tools to read data from GPS into database and tools to export data in different formats like gpx and tcx.
GeoDB is a set of tools and perl modules to store, retrieve and search for information on geocaching and other geographical data sets.
Mobilemaps is a Nearby Engine which allows users to find Web pages by location. Extremely fast and capable of scaling to any number of pages, it supports OpenGIS map-servers and uses MySQL, Perl and C.
A world atlas and encyclopedia, using a PHP web interface to display world maps, with links to Wikipedia entries countries and regions.