There are the main stream Alt Processes most of us know like Plt/Pld, CyanoTypes, etc but what are some of the others. Like the Uranotypes that Mateo does, the wet plates Clay and Kerik have been working on, Tin Types.

What is the criteria for a process to fall into the Alt Process category?

Just curious and wonder if any of the Alt Process practioners on this site have ever considered doing an article (hint! )