Undertale AUs (in my opinion)

Hi! This is a random idea I came up with, and in it, I'll be listing every undertale au I know of, and (at least) every main character within them. In my point of view, of course. If anyone wants to share their views on any of them then fine by me, also tell me if there are any I missed and should check out.
Also note that I do try to learn about them, but there are many different views on each, so refer to earlier. I may add some AUs I have not heard of, or don't exist (which I highly doubt) and have created by myself.
Cover art: http://img0.joyreactor.cc/pics/post/Undertale-%D1%84%D1%8D%D0%BD%D0%B4%D0%BE%D0%BC%D1%8B-Frisk-Undertale-%D0%BF%D0%B5%D1%80%D1%81%D0%BE%D0%BD%D0%B0%D0%B6%D0%B8-2651184.png