Alembic is an open 3D file format supported by pretty much all the major 3D modellers these days - including Blender, Modo, Houdini, Cinema4D and plenty of others besides the Autodesk tools.
Neither Unity nor Unreal currently support Alembic - this is the first indication I've had that the Amazon engine might have some features the others don't.
Thanks!
Speaking of which, Maya LT is not that badly priced for what you get - I have no animation ability but I've seen my friends do some incredible things with it. If you're artistically inclined, have a play. Regardless, the lack of Blender support makes me sad.
As a side note, Maya added Python as a scripting language a while back. You can also write plugins in C++, which can be a nice way to write custom exporter code sharing engine code files for file formats and such.