Yum (a Mac recipe organizer)
I am officially obsessed with Yum. I’ve been on a baking spree lately (in fact, why don’t you check out my food blog? Hell yeah, self-promotion!) and this has been a positively irreplaceable program for me. You can copy the ingredients from a recipe to your clipboard and click “Paste ingredients” and it will figure it all out for you. Then you can tell it you want fewer servings, or more, and it will recalculate the ingredients. It will add things to a shopping list for you that you can print out. It is basically the awesomest thing ever (aside from the head-tilting pugs, maybe).