There are other smoothing techniques more prevalent in NLP that I'm learning about in my NLP class which distribute probability mass more evenly, but really won

There are other smoothing techniques more prevalent in NLP that I'm learning about in my NLP class which distribute probability mass more evenly, but really won't help (at least I don't think so) in a classifier. Witten-Bell and Good-Turing are the ones I can think of off the top of my head.