Comodo Memory Firewall (2.0.4.20)

Publisher's description of Comodo Memory Firewall

Free Comodo Memory Firewall adds another critical layer of security to home and business PC’s by monitoring for and preventing most types of buffer overflow attacks. These attacks occur when a malicious program or script addresses more data to its memory buffer than it can store. The goal of most attacks is to destabilize the system then install malware onto the victim PC in order to execute a range of attacks such as identity and data theft.