Smartphone Protection Products

DroidSecurity: Scans Android devices and apps, as well as Web sites you visit, for malware; blocks test-message spam; and offers tools for remotely locating, displaying messages on and wiping data from lost or stolen devices. A backup and restore service is in development. (Android only. Free basic version and $10 Pro app)

F-Secure: A suite of software that includes malware protection, a firewall, technology to keep you safe while browsing the Web, and tools for locating or wiping data off a lost or stolen phone.
(Android, Symbian and Windows Mobile; 40 EUR for one year.)