Hi! I haven't used these particular drivers, but the community go-lang driver (https://github.com/dancannon/gorethink) is reportedly excellent, and the new Java/JVM driver (https://github.com/npiv/rethink-java-driver) is supposed to be quite good.

We've been working really hard to keep the surface area of the product minimal so the dev team can stay nimble, which so far allowed us to ship features and stability improvements very quickly. We have a lot of really exciting updates planned for the next few releases, so we'd like to stick to the current model for now. After that, we'll start expanding the dev team and bringing some of the community drivers under the official RethinkDB umbrella. I don't have an ETA for this yet, but I expect this will happen within a year or so.

I've been using https://github.com/bitemyapp/revise (Clojure Driver) for a few months and its pretty good. Its two versions behind right now, however, though work is slowly going on to bring it back up to date.

O don't forget the scala one https://github.com/kclay/rethink-scala :D

Arghh, sorry. I haven't used Java in years, so all JVM-related languages/drivers are kind of mashed together in a single bucket in my mind. I really ought to play with scala/clojure to unmash them.