Most popular downloaded programs?

For an upcoming post, I’m putting together a list of the programs that someone is most likely to download and install after completing a clean installation of Windows.

Here are the programs that I come up with quickly:

* Firefox
* Picasa
* Skype
* iTunes + QuickTime
* Windows Live Essentials
* Adobe Reader
* Flash
* Java

Of course, I have more entries on my list of personal faves, and there are some essential categories where there isn’t a clear leader antivirus and security programs, for example. There’s also a second tier of popular but not essential software, like file compression tools, disk utilities, and disk-burning software. But right now I’m looking for the ones that are really , where someone is very likely to want a quick download link.

Which programs did I forget?