Microwave light butter popcorn -- I don't particularly care for the taste of "smart pop" or 94% fat free, but the "light butter" tastes good and isn't too bad on calories/fat.
If you don't have a problem with Olestra, the Fat Free Pringles are really tasty (I go through a can of these a week
). I like the Wow Doritos and Wow Tostitos, also, but I don't care for the Wow potato chips.
Pretzels are good. Baked Lays are pretty good (I like the BBQ better than the regular).
Surprisingly enough, sometimes a dill pickle spear helps with salty, crunchy cravings. Celery works for some people too (not me though).
Hope this helps.