It is packaged in Debian (at version 6.4, last stable, now).
We're working intensively now on CGE version 7.0 with lots of new features, like visual editor, full glTF support, Physically-Based Rendering. You can download the snapshot CGE version 6.5 from our main page to see what's coming.
Along with the engine, we also made a view3dscene, a tool to view 3D models in various formats which is also packaged in Debian.
I'm also the maintainer of PasDoc, Pascal documentation generator (also packaged in Debian ).