MSR again… well for the liquid fuel stove anyway. My experience in New Zealand with gas at low temperatures convinced me to stick with liquid fuel stoves for trips that may have cold weather.
For gas stoves I have a neat little something that has a self-igniter built in. I use this stove daily to make my early morning cup of espresso (yeah the old way…) and its been going strong for over 6 years now. Highly recommended.