defold is a cross-platform game engine that is now open source since the Defold Foundation has released it under a new license. You will already know that its owner was King, a famous mobile video game developer, like the well-known Candy Crush. Well, now it will be open and could lead to many interesting projects.
If you remember, Defold was already free before and cross-platform as I said, but after this announcement one more step is taken. «We are immensely proud to be able to open Defold as open source and we can't wait to start the new journey together with our community of video game developers creating games using this graphics engine.»
La new license by Defold is a derivative of the official Apache 2.0 license. You already know that this Apache 2.0 is approved by the Open Source Initiative (OSI), although I do not know to what extent the modifications that have been made since the foundation will affect it and if it can really be called "open-soure" or 100% open source ... Perhaps it would be more correct to say that it is "available source".
The new development team and the Defold Foundation, it seems that vstill on the right track, at least when it comes to personnel. They now have King developers on their board of directors, along with their boss Sara Cedberg, and other top industry people like Elin Eriksson (of Women in Tech Sweden).
Surely there will be more news about this graphics engine soon. Defold has potential and with the available sources it will be able to contribute new things. Furthermore, it is compatible with GNU / Linux both to create with its editor from this platform and to create video games for this platform. And it is receiving contributions to support the powerful Vulkan graphical API. Many pieces that are beginning to fit together and could create an interesting puzzle ...
Official Web - defold
Code - GitHub
Free software is not, because they have modified the Apache license so that you cannot sell modified versions of the engine.
From his website: «You can not commercialize original or modified (derivative) versions of the Defold editor and / or engine»
And open source, either, just shared source or something like that.
Do not see a lot of trouble that has been mounted on twitter (and I have heard that also on news.ycombinator), on twitter we received an echo from Godot who initially made public support but later members of the Godot nucleus began to describe that it was open source.
If the source code is available, then it is "Open Source".
That it follows the philosophy / methodology of GNU or OSI is something else.
Hence the objections of free software purists to the use of the term "Open source" ...
The truth is that I did not try it, but it has an air of Godot engine that even seems to have been taken from there.