Actually a lot of very interesting #infom7 extensions are provided from this SourceForge account maintained by Leonardo Boselli:
https://sourceforge.net/projects/milleuna/files/Extensions/3.0/
He usually upload a release via FTP. We can help him in tracking the whole project using git, and pushing some extensions upstream here:
https://github.com/i7/extensions/tree/master/Massimo%20Stella