Notabase is now in alpha! I've been working on it for the past 3 months and I'm excited to have people start using it.
Notabase is an open source personal knowledge base for non-linear thinking. It supports rich text, auto-markdown conversion, backlinking support, and more.
It's based off of Roam Research, Typora, Notion, and other note-taking apps, taking the best features from each of them and combining them into a simple, easy-to-use app.
It's free while in alpha. Give it a try here: https://notabase.io. Would appreciate feedback!