I rarely if ever see ZeroTier mentioned as a solution, but it’s a self-hostable encrypted virtual mesh network (with a small free tier for corp-hosted), super secure, and really easy to setup. I use ZTnet instead of the free-tier corp-hosted controller

AfterDark was awesome

Cool! Is there a public instance running anywhere for users to connect and check it out?

Something cool & useful? htop. Something cool but useless? cmatrix

There are also various text-based screensavers like the windows pipes and such, but I don’t have those project names handy.