SSH
screen
irssi
(and vim as a close fourth.  I suppose if you count instances used, vim moves above irssi and irssi above screen, making the list ssh/vim/irssi/screen)

I don't know about opera, but you can definitely live with just Mozilla. 

Well, it's been a few months and finally the IRC channel that I started ( ##video on freenode ) for the community has begun getting users.  Hopefully soon we will see the forums getting used as well as people who aren't planning to be "regulars" visiting and staying around a while  :D