I don't know if we have had anything on clocks, but I got interested. First I found a small page on a man in prison that made a clock with Popsicle sticks, and nail clippers. There aren't any plans, but it is an interesting picture and story. Then I found an article on MAKE that had a link to a great BuildDiary. There are designed and built by Gary. He gives out the plan for free. I also found another site with free plans.