The twinBASIC IDE may not be final; Wayne has mentioned building a new one, and the current one will certainly be getting upgrades-- a few in the next couple months before v1 at a minimum. If you want to weigh in on the most important IDE features for that stop by the 'IDE enhancements' thread on the tB Discord.

I guess there's also RadBasic but at the rate it's progressing it will be a decade or more before it even approaches being able to run real VB6 programs, while tB can run many now.