Security site Secunia has a new program. It's sort of like a "Windows Update" but for 4000+ other programs:

The first time it scanned my computer, it showed me that Quicktime, Skype, OpenOffice and several other programs had newer versions, and provided direct download links.

Now it sits quietly in the taskbar and alerts me whenever a newer software version is released.

This is important because a lot of internet-based attacks are taking advantage of bugs in non-Microsoft programs, for example Skype.

https://psi.secunia.com/