Creatine will increase your ATP levels, and consequently your energy levels. It will take roughly 30-60 minutes to start acting after taking it. Therefore, it may act in part as a pre-workout supplement, but it won't give a very prominent energy boost as some pre-workout supplements will.
If you want to avoid stimulants, you can use a pre-workout supplement called DSpark - it has no stims in it, and yet it will give you quite a good energy boost. What I like about it, is that unlike stims it will give raw energy, and not this sort of hyperactivity you get with stims.