Small Web IDE
This is a small IDE (if you can call it one) I made a while ago. Added some extra things and now i'm posting it. All it uses is the Monaco Editor. It also isn't very complete, but there is a terminal that works.
I basically slapped xterm and Monaco together and made this.
The terminal is xterm (tried making my own but gave up).
The editor is Monaco Editor.
That is all there is though.