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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.
there is also the Minispec which aims to be a more simplified Hyperspec, however please note that it includes functions and resources from external packages like Alexandria, Iterate, and others.
Hello and welcome. I hope this will help you: https://lispcookbook.github.io/cl-cookbook/ (see: data structures, files and directories…)
I've found Zeal has an offline version of the hyperspec (they just called the docset "Common Lisp"), and it's all indexed and offline, so I use that in practice.