Substack : Substack is an online platform that provides publishing, payment, analytics, and design infrastructure to support subscription newsletters.
Bottery : Bottery is a syntax, editor, and simulator for prototyping generative contextual conversations modeled as finite state machines.
Neuron Zettelkasten : Neuron is a future-proof open-source app for managing your plain-text notes in Zettelkasten style, as well as for publishing them on the web.