The program is Apophysis 7x.
Download link and source is here http://apophysis.xyrus-worx.org/download
https://github.com/XyrusWorx/apophysis7x
What tools do I need to start integrating it in Blender?
Thx
You can download the blender source code from http://www.blender.org/download/
Also see
http://www.blender.org/get-involved/developers/
http://wiki.blender.org/index.php/Dev:Contents
Is there a tool for Blender which can directly wrap this source into Blender as additional renderer or as a plugin?
I couldn’t find what I need.