Meet Filmomat: an automatic film processor capable of processing 35mm b/w negatives up to 5×7″ color slides. It has a 6L water reservoir for rinsing the film between developing stages. This programmable machine seems straightforward to use. Just load the film into the tank, add chemicals, and press the appropriate button.
A impeller pump leads your solutions into the tank. The machine maintains the correct temperature and has two displays to indicate it. The whole machine takes as much space as a microwave oven. Echolot789 invented this machine and will make it available for sale on request. More information is available here.