Mour Powa!

One thing you need for just about every project is power.
Different voltages, different currents.
It can all get a bit messy. I have known about using computer power supplies as said source of said power, but these new(ish) boards make it a lot simpler.

I really really like this new version and will probably pick up two of them once they become available.

Its important to note that the link at the bottom is for the old version, not this new USB version, so the price and features are very different.
(Like I said, I have held off getting one because I really wanted USB which the new one has two of).