F* now has tactics, it is very new, but no doubt that it will evolve a lot...
https://github.com/FStarLang/FStar/tree/master/examples/tact...
We've been mostly studying hammer-like tactics to, say, apply some theorems at specific places in the goal (which the SMT might be bad at), and not for chaining small rewriting or logical steps (which the SMT is good at).