I am a supporting member of 350.org.
The Alt-E Store is a great resource for alternate energy products and information.
Be sure to check out Green Onslow. They’re trying to make a difference by educating people in sustainable living practices that anyone can afford.
I’ve gotten a lot of installation help and some of my gear from Starfire Solar. If you’re in eastern North Carolina, Mike is a great resource for solar thermal projects. He builds his own water heating and air heating solar panels.