-
-
SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
While working on Alumina programming language, I created an online compiler playground that can be used to compile & execute code examples. The playground itself is now open-source too and I was thinking to make it reusable, so people can plug their own compilers and interpreters for their own languages.
It might be worth adding TextMate grammar support (like in monaco-tm) if you do this. Saves people needing to write two grammars for the web playground and local development.