Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
Ostorlab - Ostorlab scans your web or mobile application and provides results showing threats and privacy issues.
Avira - Cloud based email security solution
Privacy Scanner (AntiSpy) Free - Privacy Scanner (AntiSpy) Free performs a deep scan and sends an alert if it catches someone trying to hack into your phone.
Microsoft Security Essentials - Microsoft Security Essentials is Microsoft's own foray into the world of virus protection.
App-Ray - App-Ray provides a cutting-edge solution for you to conduct a system-wide analysis and detect vulnerabilities in your mobile applications.