Let me introduce the Golang client library for steemd's RPC endpoint: go-steem/rpc
This client library is by no means complete or correct, I just put together what I have been using when playing with the RPC endpoint. The library is already pretty usable, though, see the examples in the repository for yourself.
I will naturally keep improving the library as I am using it, but in case anybody wants to join the effort, please be my guest. There is still plenty to do.
I believe that it is not necessary to post any examples here, please consult README.