Here is a web site that I recently came across that called StopBadware.org. It's dedicated to warning people about 'bad software ' that contains malicious code (aka malware), such as: viruses, spyware, etc.
Currently there are 412+ reports of 'bad software' on the site. I hope to see more added soon, this could be a valuable resource if people contribute to it.
Below is an excerpt from the site: "StopBadware.org is a "Neighborhood Watch" campaign aimed at fighting badware. We will seek to provide reliable, objective information about downloadable applications in order to help consumers to make better choices about what they download on to their computers. We aim to become a central clearinghouse for research on badware and the bad actors who spread it, and to become a focal point for developing collaborative, community-minded approaches to stopping badware." Read more.