From a quick search, Haxe can be found on github [1] and its website [2] has
some explanations as well, including how it uses a bytecode VM [3] to work
cross-platform (essentially the same way java does it).

[1] https://github.com/HaxeFoundation/haxe
[2] https://haxe.org
[3] https://hashlink.haxe.org