Which ones do you have in mind, if you don’t mind me asking?

I would LOVE to have a FOSS Bluebeam

Yes. Bluebeam Revu can do everything Adobe Acrobat can do (better imo).

Acrobat is still a product of Adobe, which is why I brought Bluebeam up.

I know this thread is about GIMP vs Adobe Photoshop, but OP of this comment thread said that Adobe has a monopoly over every business use. Not the case in the construction world

In the construction world, Bluebeam is a good contender to Adobe.

Still corporate though