Powered by the same engine as the Retina Network Security Scanner, Retina Community is a completely free security scanner for up to 128 IPs. Use it to scan servers, desktops - any networked device - for security flaws, and learn how to fix them.
New: Now, you can scan virtual applications, deployed via VMware ThinApp, for flaws as well. This is a new industry development, completely unique to eEye.
First! I've used Retina for years, it's by far the fastest, most accurate scanner available. This free version is as powerful as the the commercial version. If they were to ever come out with a Linux version, this would be one of the more popular SF projects, for sure.