I have been testing a FREE and Open Sourced game engine called Godot (MIT license).
I have to say that it is turning out to be a potential rival for Unity. I started using Unity before it became popular. This engine gives me the same feeling I had when I started using Unity. Of course, Unity has grown since, but this engine is already showing lots of promise:
Website:
http://www.godotengine.org/wp/
Overview:
Develop games using your favorite operating system:
- Godot works on Windows, OSX and Linux.
- Editor runs in 32 and 64 bits, in all platforms.
- Small download (around 20mb), and you are ready to go.
- Easy to compile yourself (no dependency helps).
Develop games for your favorite platforms:
- Mobile Platforms: iOS, Android
- Desktop Platforms: Windows, OSX, Linux
- Web Platforms: PNaCL
- Consoles: Playstation 3 and Playstation Vita (only with license from Sony)
- Upcoming (not stable yet): HTML5 and Windows Phone.
- One Click Deploy & Export to most platforms. Easy to create custom builds too.
2D and 3D
Built in UI Designer
Uses Custom Scripting langague (but you can use C++)
Screenshot:
[Blocked Image: http://www.godotengine.org/wp/wp-content/uploads/2014/08/460x270xpage_visual.png.pagespeed.ic.poUmcOtoty.jpg]
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