Software as a political issue? News to me...
text editor:
-word
internet:
-firefox
other major bits of software i use pretty much daily:
-photoshop
-excel
-winamp
-utorrent
...and a whole bunch of protein manipulation proggies too many to list
operating system:
-windows xp (Although I've managed to delete most of my hard drive twice through my ignorance, which I've been told is quite an accomplishment)
-Katrina (OK, she's my roomate, but really, she IS my operating system--I'm such a lost cause with computers...)
I use .doc unless otherwise requested. It seems fairly common with the people I deal with...
-db