Rygal is a free open source engine for games using haXe & NME. Rygal is licensed under the terms of the GNU Lesser General Public License (LGPL).
Can I have more information about the license?
The LGPL, under which this project is licensed, makes Rygal free to use in your project, even if they may be with commercial purposes.
You may ask, why the engine uses LGPL instead of GPL, well the reason is very simple, projects that are licensed under the terms of GPL aren't allowed to be used - even as a library - in projects that are using other licenses than GPL. The LGPL gives you the right to use this library in your project, no matter under which license your project is.
What is the engine built on?
The engine is made using haXe & NME.
If you have any questions, feel free to ask me per mail.