Rift currently provides us with the option to modify the default user interface now (as of 1.8) on the live shards as a public beta. Updates to the API will be pushed to the Public Test Shard (PTS) and then pushed live once tested. The API is just in its starting phase so there will be more to come with later patches. Riftui is dedicated to providing not only a large collection of AddOns created by many talented authors, but also provide tutorials and API information to help you create your AddOns.
If you have questions about creating an Addon or have new ideas, please join the discussion on our forums. Rift AddOns are available for download here. Stop on in and see what is new.