I wish I could say brewing has been a DIY hobby. I've read a lot of books, and used forums during almost every step of every batch, and I sure didn't write any of the books. One day, I'll know enough where I won't need help, but for now, I'm glad the help is out there. As for software, I'm sure you already know that most Linux programs aren't as feature rich as ones you have to pay for. 20 isn't a lot to pay for what, say beersmith, can do, but as fate would have it, I'm booted into my Linux partition as we speak looking for a free program. I don't really get Linux, and probably won't even be able to install something if I find it, but I'm learning.