M29,
SW models 642, 442, 638, and 36. I am sure there are others in the SW lineup as well.
Ruger SP 101 is a nice snub too. a little heavy for pocket carry IMHO, but it is a very well built revolver.
And yes, I think a snub excells specifically in concealed carry and self defense. I prefer to carry a SW 642 because it is so easy to slip in the pocket, light enough not to be noticeable, quick and easy to deploy, and I feel that 5 shots are plenty to get out of trouble should trouble come looking for me. (I really try to stay away from trouble as best as I can, and have been succesful for 25 years. Hopefully that will remain the case!) I think others feel similarly about the little 642, but that is not to say that it is the best. What is best for me may or may not be best for you.