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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.
My recommendation would be Alive, a Visual Studio Code extension. It still has a few rough edges (for example, one bug I tripped on is that it doesn’t work super great with VSCode’s anonymous tabs, it apparently expects a file on disk), but is still far and away the best free non-emacs CL development environment I’ve used.
I've been using Atom with SLIMA on Ubuntu linux. I was working on something for some friends and put together a setup guide for it as well: SBCL, Atom, SLIMA setup