Hyperstition: A daily newsletter about science fiction ideas that turned into reality.
Dead projects
Hyperbulletin: A silly website, where you've got to spend $1 to post up to 255 characters max.
This is the very first time I made $1 from my very own project online. It was a fun experiment, but I do not intend to promote it as it's too silly, and feel bad karma-wise to make people spend money on it. I was taking inspiration of The Million Dollar Homepage, but I guess it was not as good as the original idea, and did not get much traction.
Valyent: An open source platform that allowed you to deploy microVMs on demand, using CloudHypervisor (a fork of Firecracker), inspired by Fly.io's approach.
My associate and I decide to shut it down, since we were not able to commercialize quickly enough, and spent a year engineering instead of looking for customers. I learned a lot from this experience, and will do things completely differently next time.
So many other ones, but I won't list them here as they were mostly small experiments, ...