Firefox and Gmail. That's pretty much all I need for a happy internet experience.

I use lots of different photo software, so I wouldn't say I have one particular program I can't live without. It just depends on the day and what I want to do at the time.

For other computer stuff, I'm becoming fond of OpenOffice. It's not complicated, and does everything I need it to. Plus it'll open documents from other programs, like Word, which is very helpful when people send me attachments and I don't have the appropriate program to open it with.