I have moved this thread to the Extensions API area of the forums for more visibility. It had been placed in the Job Postings group by mistake.
There are some available for donwload. Some free and some needs subsription/fee. See them below: Tableau Extension Gallery (BETA)
Here, you have to download it to your local machine and then go to Tableau/Extension and then find that .trex file and configuration and then you are good to go. Hope, it helps.