diff.cryptothis.com - A live-updating visualization of the current Bitcoin difficulty epoch. Badly needs a FAQ. My bad.
dgcoursereview.com - A ten-hole disc golf course I designed several years ago with another fellow player. We did they best we could with what little, fairly flat land we had to work with. Having played over a hundred different courses, it's somewhat boring if you ask me. I'm hoping to engage the park district folks again soon to get more trees planted.