What "Tools" Do You Use?

[MaddHatter]

Coming out of a B&M Poker Scene and into the Online Poker Scene, I've noticed that there are many "tools" you can utilize that aren't normally available. Software, Charts, etc are all things you can refer to while sitting infront of your computer screen, but if you were to whip out a calculator at a B&M Game, you'd get the [censored] kicked out of you.

So here is my questions, what "Tools" do you utilize when playing online, how does that help you, and why do you choose to use them? This can be anything from PT & PAHud to Printable Outs Charts or whatever, I'm just curious what everyone uses if anything.