Allows you to monitor the movement of users on a Google map.
Geosearch is a free/open source program to monitor the movement of users on a Google map. You can send SMS, make calls and find the optimal road to reach another user.
Geosearch is an Android 4.0 application (API level 14).
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
OpenDMTP is a protocol/framework that allows communications with small devices (mobile phones, PDA's, and other high-latency/low-bandwidth devices), especially geared towards the transmission of GPS, temperature, and other remote monitoring information.