Nightcode
https://sekao.net/nightcode/
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The editor supports rainbow parenthesis and provides a matching highlight behind the form your cursor is inside of. It also uses Parinfer, a beginner-friendly Lisp editing mode. For any file, you can optionally enable an instaREPL, which will show the live evaluations of your code to the left. Reader errors are displayed inline, so you see them immediately.
