The October 2015 Issue of Software Development Times Magazine has an article entitled "Drones: The Sky's The Limit" that talks about trends in software development for drones. One trend of note in the article is the emergence of Linux as the operating system of choice for drone hardware. According to the article, drone control systems are moving towards integration with Linux. The open source software community for drones is even gaining some formal structure. Dronecode is an open source UAV platform within the Linux Foundation.
Rock on Linux. Glad to see your being used on board drones!