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
Map-Fu is a full-featured web mapping interface written using PHP/Javascript that can be modified and used as part of a custom web mapping application. It is designed to function as part of an open source mapping stack including UMN Mapserver.