It's been a long while since I needed to build relatively simple apps, and much has since changed (cloud computing, webapps etc).

In the past, things like Borland Delphi were a good starting point. Recently, I played with Google App maker, which seems almost 100% perfectly suited to build simple, SQL backed applications. It's reasonably expandable with server side and client side snippets, has a decent number of widgets and a decent deployment framework too. The fly in the ointment is that AppMaker only works for users in the same Google GSuite domain, so I cannot use it for general app building.

I'm loathe to start dealing with UI details in code and really like a visual tool that helps me focus on application logic.

I appreciate any pointers to such application builders. Ideally, they are free/open source, work on a Mac or linux or don't have heavy license handicaps.

Thanks!