Lets you monitor your GPS-phone. You have full control of your own data. Both client software (for phones) and server software is free open source, so you might set up your own server or use the default one at opengeotracker.org
Earnest is a A PHP-MYSQL AI EXPERT SYSTEM for creating powerful expert system easily. Its simple PHP API can also be called from JAVA, browsers or other software to perform GIS and other comparisons. Also has ability to create XML results.
CommonMap is an open source map project, forked from OpenStreetMap by a licence problem. CommonMap needs original softwares tuned for CommonMap. Most of software would be useful for any other open source map projects, too.
OSIOSS (Open Source Integrated Observing System Software) is a collection of code which can be used for geospatial observing systems merging data collection, management and products solutions with ocean observing systems (OOS) as an initial focus.