Yesterday, we released the new XCSoar major version 6.7. The biggest change was the port to Kobo e-book readers, a new hardware platform with perfect sunlight readability.

http://www.xcsoar.org/discover/2013/...-released.html

XCSoar is a free glide computer that runs on Android, Kobo, Windows CE, Windows, Linux, Raspberry Pi, Cubieboard and others. It is being developed by many volunteers from around the world. More than 37,000 pilots have installed it on Android via Google Play, plus an unknown number of anonymous downloads on various other platforms.

http://www.xcsoar.org/