Stacks Editor; other editors

[mustafa0x]

I noticed that Stack Exchange built an editor on ProseMirror

• https://editor.stackoverflow.design/
• GitHub - StackExchange/Stacks-Editor: Stack Overflow's Combination Rich Text / Markdown Editor
• Opt-in alpha test for a new Stacks editor - Meta Stack Exchange

What similar projects exist? Would be nice to compile a list, especially of open source editors.

[marijn]

Neat, I didn’t know it was in alpha now. Another similar thing that comes to mind is Atlassian’s Atlaskit editor.