https://www.wanikani.com/
WaniKani is a Japanese radicals, kanji, and vocabulary learning web app that uses mnemonics and SRS to make kanji learning simple.
wanikanikanjilearningapplicationtofugu
https://greasyfork.org/en/scripts/395595-wanikani-locked-count/stats
Adds a locked count to the SRS breakdown on the dashboard
wanikanilockedcountstats
https://greasyfork.org/en/scripts/439837-wanikani-back-to-back
Makes reading and meaning appear back to back in reviews and lessons
wanikaniback