The Stable 3.9 Universe is a package universe based on Squeak 3.9 and including 105 optional packages. The following file has an image and changes file based on this universe, along with a fully populated cache of the packages in the universe:
Here is a screenshot of the image's initial state:
This universe is closed for active development. A maintenance update will be posted if major problems arise, but all active development is now in the Stable 3.10 Universe.