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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.
Astro is a really lovely, well-thought-out framework for creating websites with little to no Javascript client-side. It uses Vite under the hood, with all the yummy features like CSS Modules, easy PostCSS, static route generation, and built-in SCSS. Astro is primarily a static-site framework because it builds everything into static assets to be served. The Astro team is leveraging a lot of SSR capabilities to not only optimize page load speeds but for using a full SSR implementation (in beta as of writing this).