I use Brewzor Pro BETA and HomeBrew Calculator (ghost chili) and they are pretty good. Basic calculators, no recipe formulation or anything, but these are just the free ones. I used Homebrew Calc today for the boil timer. It has the ability to enter in your hop additions and will alarm when it's time to add. Nice feature. Brewzor does have some recipe formulation, but I haven't used it; i stick with Beersmith on the desktop.