Nip Bookmark Folder (Some of these I haven't been to in a hot minute, so they may be dead):

http://yellowjealousy.tumblr.com/
http://meghewlett.tumblr.com/
https://yuu-tori-tori.tumblr.com/
https://anlamveg.tumblr.com/tagged/s4cc
https://kijiko-sims.tumblr.com/
http://ooobsooo.tumblr.com/tagged/mycc
https://karzalee.wixsite.com/studiok
https://ayumea.wixsite.com/a-luckyday
https://kiruluvnst.wixsite.com/kiru
https://kiruluvtsn.tumblr.com/
http://misaki0218.blog98.fc2.com/blog-category-32.html
http://kewai-dou.com/the-sims-4/
https://www.hanecco.net/
http://mkstudio684.blog.fc2.com/blog-category-4.html (Dead, but hopefully will come back T-T)
http://m0m0-ka.tumblr.com/
https://www.roseum.co/#download
http://tlayer.tumblr.com/
https://tsukejake.wixsite.com/tsukejake-tsamon/ccs
http://imadako.tumblr.com/
http://cc-colorful.net/DL/menu/menu.html
https://ahiruchanet.wixsite.com/ahiruchanetstoybox/untitled
http://src69.blog109.fc2.com/blog-entry-157.html
http://shambalasims.tumblr.com/tagged/downloads
http://tsutoki.tumblr.com/tagged/ts4-cc-download
http://junipasims.tumblr.com/tagged/favorite-cc
https://simfileshare.net/folder/44203/
http://sweetmintsims4.lofter.com/
https://mahusim.blog.fc2.com/blog-category-14.html
http://junara-sims.tumblr.com/archive/2015/12
https://blog.naver.com/black_facsination (Could be korean)
https://fayesta.tumblr.com/tagged/ts4cc
http://sims4ssgs3.blog.fc2.com/category7-0.html
https://es439lotus-ts4ccreblog.tumblr.com/archive
http://aoihana2510.tumblr.com/downloads%20ts4%20ts3
https://noir33.tumblr.com/archive
http://purplelovesims.tumblr.com/
https://95643222.tumblr.com/
http://yumiaplace.tumblr.com/tagged/download
https://mqruby.wixsite.com/ruby-sims
http://simblrryuffy.tumblr.com/
http://hitohari-sims.tumblr.com/tagged/download
http://miyako107.tumblr.com/tagged/ts4cc
https://jessievegas.tumblr.com/
https://hangedxt.tumblr.com/tagged/Ts4hxt
https://simfileshare.net/folder/31128/
https://simfileshare.net/folder/38785/
https://simfileshare.net/folder/31098/
https://sakuraflora.tumblr.com/
http://elainevv.tumblr.com/tagged/mysims4cc
https://kiellessa.tumblr.com/tagged/my-cc
http://cosplaysimmer.com/anima-hair/
https://ayoshi.tumblr.com/downloads
https://tokiboo.tumblr.com/downloads
https://lunarian-sim.tumblr.com/tagged/creations
https://playfulwanderer.net/sims/sims-downloads/sims4-downloads/
https://911331.tumblr.com/tagged/download
https://kujo-sims.tumblr.com/
https://29qsims.tumblr.com/
https://game.blogmura.com/thesims/ranking/in?p_cid=10997791 (It's sorta like simsearch, I guess???)
https://umemaru2551.tumblr.com/
https://kittysims4.tumblr.com/
https://notanotheranimesimblr.tumblr.com/post/170429128685/anime-game-themed-cc-for-the-sims-4
http://opasim.blog.jp/
https://ir7770.tumblr.com/tagged/ts4cc
https://emmastillsims.blogspot.com/2019/05/cultural-lookbook-japanese.html