What apps do you use most on your iDevice/Mac?

I'll start the post by saying Newsify! Can't get enough of this thing:


via i1300.photobucket.com

And I'll finish this by saying Insomnia X for my MacBook Air. I hate having to plug it in to the power all the time to use my external display. So, in an attempt to save my battery from eventually not taking a charge anymore, I just use it to keep my Air running while in clamshell mode.