No special development is needed, its just black and white film. There are tons of developer combos and timings on the net, there is one dedicated eastman XX site, and a long thread over at rff.

Eastman double X is cine film, but can be rolled to be shot in still cameras. It has a slightly different sprocket hole pattern, with rounded sides to accommodate the high speeds inside motion picture cameras. It is quite durable as well when handling.