Foursquare is a location-based social networking website, software for mobile devices, and also a game. Users "check-in" at venues using a mobile website, text messaging or a device-specific application. They are then awarded points and sometimes "badges." The service was created by Dennis Crowley and Naveen Selvadurai; Crowley had previously founded the similar project Dodgeball, which Google bought in 2005 and shut down in 2009. As it closes in on 1 million users in April 2010, Foursquare is being pursued by Internet giant Yahoo! Inc., which has offered as much as $125 million for Foursquare.