Lookout Security & Antivirus
This app is a real time scanning engine that looks for virus and malware in every downloaded app. It back’s up your data online and has an alarm to alert you incase your loose your phone.
AVG AntiVirus FREE for Android
This is the ultimate AV app for the Android. It uses a cloud based AV engine so your phone doesn’t get weighed down with virus signature files. In addition to scanning apps you download, it has the ability to scan every file on your phone, including mp3s, zip files, and even your entire SD card.
SmrtGuard Mobile Security
This app is a bit of a swiss army knife of security. It will help you track your phone in the event that it’s stolen/lost and allows you to lock your device and render it usless. It comwes with a call blocker and sim coard protector as well. Upgrade to the pro version for backup services, anti-virus and more.