WYSIWYG or What-You-See-Is-What-You-Get is a tool that allows content to be edited in a form that resembles its appearance when displayed.
So far I've tried just Quill and Summernote.
Both are free, open-source and awesome products overall.
While I was searching, I came across other WYSIWYG tools like TinyMCE and CKEditor. They are advanced, feature-rich, more enterprise-level solutions with paid plans.
What's your favourite WYSIWYG editor?