Building Jottit with Aaron was one of the most satisfying creative experiences of my life.
I've now rebuilt it from scratch. It’s basically the same idea, but even simpler. Go to jottit.org, write markdown, and you have a published page. Claim it, pick an address, and you now have a feed of your pages at yourname.jottit.org. There's no signup to start writing. And no js on public pages. You can export your writing when you want.
Jottit is free and open source. It's not a startup, just something I really wanted to exist again.