10 free utilities no computer should be without.....

[poltr1]

I'm building a list of 10 free utilities no computer should be without. Here's what I have so far:
Adobe Reader
Adobe Flash Player
NoteTab Light text editor
WinMerge file difference/comparison tool

Mozilla Firefox web browser
Mozilla Thunderbird email client
OpenOffice office suite


What other free utilities should I add? Include links.

(Note: I'm not including non-free shareware here. As much as I think WinZip is an essential utility, it's not a free utility. There will be a separate list for shareware.)

Comments

[stevemb.livejournal.com]

There are several free-as-in-beer security programs for home use; I use the basic edition of ZoneAlarm and Avast Antivirus.