A cold frame with a glass top can give you a 12-month growing season, even in Maine, and it's the easiest and most economical way to extend your harvest. Build the one described here, and you're on your way to fresh veggies year round.
Root Storage Bin. Root veggies like carrots and beets stay fresh all winter and even grow sweeter in this storage bin. Just fill with damp sand or sawdust, alternating with layers of veggies. can also house potatoes, turnips, and squash $34.95
The U-Gro Hydroponic Garden System to allow you to grow your own veggies, strawberries, herbs, and flowers in a very small space. It is great for growing bush beans, basil, swiss chard, spinach, leafy greens and other plants. http://ugrogarden.com