Blocks and Belts a Factorio-like factory building game on a procedurally generated planet.
It's free and browser-based (pure javascript with WebGL2, no plugins whatsoever). I'm not going to repeat the full intro text from my game's site here, head over there in case you are interested ;-)
Here are a few teaser images (all in-game graphics):
Procedurally generated planet:
A rather advanced mid-game factory:
Tech-Tree
Feedback is appreciated!