Yande.re/Konachan Masonry(Waterfall) Layout. Also support danbooru/gelbooru/rule34/sakugabooru/lolibooru/safebooru/3dbooru/xbooru/atfbooru/aibooru et cetera.
< Feedback on Yande.re Masonry
There is an official Sankaku WebApp (https://sankaku.app) that works fine. And I didn't find the Sankaku Channel API documentation, so it would take some time to parse their html code to add this site. I'll put it on hold for now.
You should add sankaku channel because they are good too and script is awesome https://chan.sankakucomplex.com