For years I've been using a little worksheet I made up in Calca to calculate how many grams of water, flour, and salt I need in my dough. I would frequently change the values for experimentation though, but I wouldn't ever be able to refer back to them. And it was also worthless if I wanted to send a specific recipe to a friend.
So I looked around for a dough calculator, and while I came across some nice ones, they didn't do everything I wanted (like bookmarking). So I of course made my own.
The Maybe Pizza? Dough Calculator, at your service. Works great on iOS as well.