There is a list of some companies on the homepage: https://www.econgood.org/who-is-ecg/ecg-companies/
It is a bit hard to give you a good answer myself as companies that I know are probably none that you know, but there is also an interactive map on that page.
I'm glad I'm not the only one ~
Ohhh I didn't know they are on mastodon I hope it was OK of me to repost it, but tumblr really started to throw me a login page recently, which hides half of the comic.
Solarpunk is great, indeed!
Also I encourage everyone to do the same and post it here, or draw solarpunk stuff ~
I know that money is sometimes tight, though.
I use smartgit it serves me well: https://www.syntevo.com/smartgit/
And it has all 3 of your criteria as far as I can see.
I recently watched downsizing, whose main topic was overpopulation and I remember a time where there were some papers on that the earth will soon be overcrowded and I'm very happy that this simply won't be an issue for us in the future anymore.
It was intentional play of words. :p
I also was playing around with that idea, but wasn't sure if I actually want to fund projects or art and architecture around it.
Basically paying artists to draw their vision, because that would be like advertising the Solarpunk idea.
Der Transrapid war kein Vakuumröhrenzug sondern eher eine Magnetschwebebahn. Also sowas wie in Japan und China täglich zuverlässig Menschen bereits transportiert anstelle ein Luftschloss zu sein.
Hätten wir mehr in den originalen Transrapid investiert bräuchten wir diesen Neuen nicht.
Digimon!
Also we should really make a Digimon Community here. ^^
Me too ~