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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.
If you're only holding coins and not moving them frequently, then a paper wallet might be good. Just generate your seed phrase and address in an air-gapped device (e.g. old phone) and send ETH to that address. If you want a bit more flexibility of usage you can use https://airgap.it or an hardware wallet such as Trezor, Keystone or OneKey. And the ultimate gold standard is to use a Safe Wallet (https://safe.global). It's a multi-signature wallet and is even formally verified to be correct. It's the best choice atm.