http://www.3rank.com/top-10-useless-inventions-time/
http://www.complex.com/art-design/2013/05/25-inventions-that-are-completely-pointless/banana-slicer
http://seriouslyforreal.com/funny/top-10-most-useless-inventions-of-all-time/
http://www.techeblog.com/index.php/tech-gadget/top-10-most-useless-inventions-ever
http://www.dailyedge.ie/the-most-useless-inventions-ever-made-1101958-Oct2013/
http://www.smashinglists.com/useless-inventions/
http://www.businesspundit.com/15-of-the-most-worthless-inventions-money-can-buy/