There are tons of film financing method available for independent filmmakers and producers. Here is a list of important finance methods. There are many more not included in this list.
Negative pickup deals
Gap and super gap financing
Investor financing
Crowd funding
Brand integration
Product placement
Grants
Tax incentives
Pre-sales
Lender financing
Insurance backed schemes
Studio development and in-house production
Studio production-financing/distribution agreements
Studio based productions company
Independent distributors
Talent agencies
Actor financing