Not currently in development [possibly abandoned]
Progress is happening daily at the moment. (17th September 2017) Progress is happening 2-5 days a week at the moment. (5th February 2018)
Abandoned, at least, for now.
GitHub Source Code (3 cores for the project are private repositories so the source code at this link won't compile by itself): https://github.com/MexUK/IMGF
The IMG Factory project started a few years ago by Mex and X-Seti.
After Mex lost a lot of source code in 2016, the project is now back into development (2017), with code backups occurring daily on GitHub.