The list at the top of this page is not up-to-date.
Not exactly a new theme, just an adaptation of three great themes in one.
Tested on version: 0.9.6
Last Updated: Oct 31, 2020
Theme “Space” (dark only)
With WYSIWYM editor, inspired by Red Graphite and California Coast themes, with a bunch of other snippets discovered on this forum (and credited).