FireEagle
FireEagle is an open platform that gives users a place to store and manage information about their location with others. The people behind FireEagle - Yahoo have also released protocols and methods for allowing developers to access the information in order to build location-awareness into their own applications. Already, Web sites which can be integrated with it include social networks Brightkite and Loki; GPS and location services Dash and Navizon; blogging platform Movable Type; and Web applications including Dipity, Dopplr, Lightpole and Pownce.
FireEagle takes the location-awareness of technologies like GPS or cell-tower triangulation and adds a "user-generated" element to it )which is a key feature of Web 2.0 applications). It also provides user with a greater measure of control over how their location is delivered and shared with others while allowing individuals to add context to their location broadcasts essentially sharing not only where they are but what they are doing in that moment.