Linux Distribution Timeline (upload.wikimedia.org)
A really neat graphic I randomly stumbled across on Wikipedia....
Pinry, the open-source tiling image board (docs.getpinry.com)
Pinry is like Pinterest, but open source and you can very easily self-host it. I just installed it a few days ago and it’s really easy to learn; I’ve saved a few images in it that I wanted to keep. It’s very handy, IMO....