We've been working on some tutorials to show off the CRDT features in Riak 1.4 and beyond.
They are simple and allow you to get a feel of what you can do with the CRDTs.
Completed Cookbooks:
- Counters [Riak 1.4+]
basho/riak_crdt_cookbook
A Cookbook full of Tutorials to get Developers started with Riak's CRDTs
Erlang