Lettera: A Refined Markdown Document Editor

This is a side-project by the team behind Bear, a notes app with the least annoying ~~wysiwyg markdown editor~~. Least annoying rich text editor.

It took them ~4 years to ship this editor, and it shows. They managed to find the perfect balance between formatting markdown as you type and minimizing content shift. It's feature-rich while still providing the interoperability I expect from Markdown.