As part of my almost criminally long article on composting (125 pages and counting) I have been looking at compost screens and sifters. Mine is something my husband knocked together in a few minutes—a wooden frame reinforced at the corners fitted with ½” hardware cloth (read: wire mesh). It's big enough to set down on the big new wheelbarrow I got last summer. I just shovel finished compost onto it and shove it around with my hands; what doesn't go through goes back into the bin.
It never occurred to me that some people shook theirs–it sounds like way too much work– until I ran into that guy in the photograph above. But apparently he saw the error of his ways, and found the plans for a two-part sifter where the screen rides on top of a secure frame. Directions for building it are available here, on the Glendale, California website.