Best for: Your first 1,500 words, right after kana
Free Anki deck of the 1,500 most useful beginner words. Each card shows the word inside an example sentence with it highlighted, plus the reading, meaning, and audio for both word and sentence; pitch accent can be switched on. Download it from AnkiWeb or GitHub.
JLPT prep book series from ASK Publishing, split by level and by skill: grammar, vocabulary, kanji, reading and listening. Each book is a week-by-week plan with one short lesson per day, with English, Chinese and Korean translations for self-study.
Vocabulary tool built on frequency data from parsing real anime, novels, games and visual novels. Pick a show or book and learn its words in order of how often they appear, with built-in spaced repetition.
Japanese-language dictionary of word origins (etymology), explaining where words and expressions come from.
