"Bits and bobbles" is a weekly, curated list of cool things I've seen people making on the Internet.
My dream is to have an automated vegetable garden which provides me all the produce I need. Projects like the Nourishmat give gardening a better UI.
2. Spark and Mesos
Cost of equipment makes biology prohibitively expensive for scientists in the developing world, or just curious hackers. Hacky yet effective open-source designs could bridge the gap.
Xmonad is the grandaddy of tiling window managers. It finally has been extended to support Mac OS X. I already use SizeUp but I'm inclined to give this a try.