In no particular order:

- Atlas, human-powered helicopter (expired)
http://www.kickstarter.com/projects/...rical?ref=live

- Run Free: "We're faking a marathon" (expired)
http://www.kickstarter.com/projects/...-2013?ref=live

- Mine Kafon, a low-cost, wind-powered landmine detonator (10 days left)
http://www.kickstarter.com/projects/...kafon?ref=live
It looks like a tumbleweed or child's toy.