Malware like DroidDream unfortunately is a real threat to Android devices; here are some essential security apps to help secure yours
Developer: Creative Apps
This is a popular antivirus application that has been downloaded more than 500,000 times and has received an average rating of four-and-a-half stars from more than 12,000 users on the Android Market. It scans applications that you've already installed onto your device and cross checks them with its own reference database of known malicious applications. Essentially, it's good for detecting malicious applications that AppScan let slip through its fingers.