Gideros Studio
Launched in 2011, Gideros has become a successful game engine with 20,000 developers registered and 500 games published. Gideros currently supports iOS and Android targets. And in 2014, Gideros was released open source allowing other developers to pitch in and convert the software to new targets. Thanks to a successful Kickstarter campaign, the team is working on making 64 bit binaries and adding WP8 and Desktop supports. Gideros Studio runs on a variety of platforms, offering a true multi-platform availability for developers. Currently the download is available for Windows and Mac OS X, but it's possible to run Gideros Studio using Wine under Linux.
