Most of these are not alternatives to GTD. They are apps or locations to record your tasks. GTD is a method of processing and recording your tasks, and you can use it on a blank page, in a written planner, or in most of the apps you have listed.

On a philosophical note, I don't really understand how having everything in one list or only 1-3 task items per day works, unless you have a very quiet, undemanding life. I have many projects and moving parts to coordinate, and trying to do it all "in my head" would give me a nervous breakdown. I do have three or for high-priority must-do items that go into my daily planner to keep them in front of my face and make sure that I get them done, but there are hundreds of others being tracked in my app (Todoist).

What some people would Regard as hyperscheduling, others call time blocking, and while some people find it vital to get everything done, others find it overwhelming. It really just depends on your job and your brain.