I haven't tested this one yet but thought I'd put it out there in case
anyone is interested. The program is currently free in its beta form.

"Haute Secure, an anti-malware start-up founded by four former Microsoft
employees, is using a new browser toolbar to block drive-by exploits from
compromising Windows computers.

The idea is to fit behavior-based profiling algorithms into an Internet
Explorer toolbar to identify and intercept malicious files in real-time.

The tool is currently available as a free beta download from the Haute
Secure Web site. http://www.hautesecure.com/ "