The following people have directly contributed to pygame_cffi:

Armin Rigo
Gert Burger
Jeremy Thurgood
John Cupitt
Maciej Fijalkowski
Neil Muller
Piet Delport
Rizmari Versfeld
Simon Cross
Stefano Rivera

Several files in cffi_builders/lib are originally from pygame itself.
Major contributors to those include:

A. Schiffler
Donald W. Gillies
Marcus von Appen
Pete Shinners
Rene Dudfield
Richard Goedeken
Ulf Ekstrom
