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Soduto
Soduto is a KDEConnect compatible client for macOS. It allows better integration between your phones, desktops and tablets.
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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.
you can find them from here , I use Soduto which is based on KDE-Connect but a bit limited in features but it does the job for me
If you just want to send a file without paying $30 for it, check out https://www.sharedrop.io/ (allows you to auto-discover peers and send files locally. No installation or payment needed, it’s a web page. just make a bookmark. Any OS supported).