"Origami Garbage Bin" - includes animation (and a diagram) to show you how to fold this. Although it's called a garbage bin, it will make great seed-starting pots since you can place the entire thing in the ground and the newspaper will quickly decompose.
Growing Lettuce in a Salad Table. (Best lettuce table I've seen so far, as it has interchangeable/removable salad trays, a lower shelf for more trays, and wheels. An adaptation & improvement of the University of Maryland's design.