You can become a chartered engineer with a background in software engineering so it is a 'real flavor' of Professional Engineering. I'm studying for the CSQE which is a Certification on Software Quality Engineering from the same body that awards regular quality engineering certificates and I've been pretty surprised/happy with the focus it has on processes that allow for reproducible quality, metrics to monitor software improvements, and its general depth on testing as a whole (for example state machine, property, and model-based testing).
I worked in manufacturing and there were P.Eng. holding mechanical and industrial engineers that held ASQ certifications on top of but not as substitutes for their P.Eng.
