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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.
Or if you're only planning to hold your ETH and to rarely send it anywhere, then just use a paper wallet! Don't even download a wallet. Just use https://iancoleman.io/bip39/ to generate a seed phase+ address on an offline computer once (make sure you remember the derivation path). On an airgapped decide, download a wallet and verify, that the seed phrase generates the same address. Then delete that wallet entirely and send your eth there. Hold it there. And only when you need it, you get you paper seed phrase, put it into a newly downloaded wallet in an airgapped decide and do the tx stuff, and delete the wallet after that again. https://airgap.it will be useful.
But if you insist, you can use https://airgap.it or http://safe.global. There the company influence is much less