I'm looking for a free comprehensive selection of the documents required for a production.
Can anyone help me?
Your request implies that there is a definitive list of documents required for all productions, which isn't the case to my knowledge. Small productions can get by with very little (or none), larger ones need a lot more. Also, are you talking about stuff that simply makes the production team's job easier, like templates for scripts, shot sheets, storyboards, etc? Or are you also referring to things that are more on the legal/professional side of things, like talent releases and contracts?
And just out of curiosity, have you tried a Google search for such documents? I searched for "film production documents" and got lots of results, many of which are free.