A poster I made to promote the Fediverse.
The PDFs and the light version is on the Internet Archive.
This work is public domain, so feel free to do whatever you want with it; for example print it on a T-shirt!
EDIT: Low-contrast Solarized versions are now available!
The main problem with that is that most of these platforms barely communicate with each other. I think mbin right now has the best multi platform support but even that is somewhat lacking.