Scratch3 Beta Feedback
See the Beta here http://scratch3beta.robotical.io
We'll be pushing periodic updates to it before release, so if something doesn't quit work right just check back again later. Please let us know if you've found anything broken, have suggestions for us or even the main Scratch 3 developers!
Scratch3 is currently slated for an early January 2019 release.
Source for Scratch 3 is on our GitHub