Right now, I'm using Redmond's Earthpaste. The lemon flavoured one is legitimately delicious. I've been thinking of trying Dr. Bronner's brand though.
I've made my own before, and I haven't really perfected making it yet, but I may start doing that too, just to reduce the plastic waste I produce. Plus, it's cheaper.
I use dr bronners all in one tooth paste. When I travel I use lush's toothy tabs because it's easier to transport http://www.lushusa.com/face/teeth/ my favourite being Boom!