Beer Alchemy is good for Mac folks. Just came out with version 2 & fixed some things. It is not perfect & I use BeerSmith2, as well. I do like the interface for Beer Alchemy better, though. There is also a nice iPhone app for Beer Alchemy. The iPhone app for BeerSmith is not as functional for me.
My girlfriend told me she'd leave me if I brewed today.
I sure am gonna miss her....