I just recently re-opened my XrmToolBox to do some Sitemap modification and found out some new plugins are available on the XrmToolBox plugin store. One of it is Ribbon Workbench 2016 beta by Scott Durow.
My first test run on my solution showing that the 2016 version is much quicker compared to the Silverlight-based version that is running on CRM web app.
Looking forward for the final version. It will be awesome!