Saad Quader is a software engineer working in a small start up, Prolog. In Prolog, he works with different web technologies. Prolog has developed donTalk (<a href="http://dontalk.com" title="http://dontalk.com" target="_blank">http://dontalk.com</a>), a Stranger Chat app. donTalk is a cool idle-time app available in Facebook, Android, BlackBerry and iPhone.