[D-Coder]

I'm using LiveCode for a dozen personal applications (and for just the fun of coding; I'm a retired s/w engineer). It's no longer free, but I started with HyperCard and LiveCode is an excellent replacement, at least for me.

[gnodar]

The OpenXTalk community is keeping the open source version alive.

https://www.openxtalk.org/

[josters]

Thanks for letting me know, maybe I need to get back into it. I always enjoyed the speed with which I could prototype new ideas and even get them installed on a phone or tablet.