Do you like free stuff? Of course you do. Well, you need to head over to Free Trade Magazine Source where you can subscribe to trade magazines that are free to professionals in the industry. I subscribe to quite a few of these and I wanted to share some of my favorite picks with you. So every week, we will feature one cool magazine pick that you can subscribe to for free, if you are a qualified professional in the industry. Today's pick is: Eco-Structure Magazine!Eco-Structure magazine is dedicated to assisting architects, builders and others interested in sustainable design and construction.