"From a voice and gesture command system for spacecraft, to an app that provides farmers information about their crops' health, this year's winners of the International Space Apps Challenge cover a wide range of technology solutions for space exploration and life on Earth. NASA, in conjunction with other space agencies around the world, held the fourth annual code-a-thon April 10-12 at more than 135 locations worldwide and the results are in. Winning apps were selected in six categories, including a People's Choice Award. Participants were asked to develop mobile applications, software, hardware, data visualization and platform solutions that could contribute to space exploration missions and help improve life on Earth. This year, 35 challenges represented NASA mission priorities in four areas: Earth studies, space exploration, human health research and robotics. The categories and winning apps are:"