I just signed up The Sketchbook Project. Basically, they send you a sketchbook, you complete it by January 15th (according to a chosen theme, the options range from “Dirigibles and Submersibles” to “Things found on restaurant napkins”. I personally chose “Nighttime Stories”), send it back and then they tour the country showing them at galleries. At the end of it all it permanently gets put in The Brooklyn Art Library where anyone can check them out.
*Note one of the tour locations is Portland, ME.