For now there will be mostly links to guides related to Learning Japanese from zero. This wiki may be expended with guides as needed.

The first step in learning Japanese is to learn the syllabic writing system that Japanese uses. Luckily Tofugu has good guides for both hiragana and katakana

The first thing that any Japanese learners should do is learn Hiragana.

LEARN HIRAGANA: THE ULTIMATE GUIDE https://www.tofugu.com/japanese/learn-hiragana/ written by tofugu

The next is to learn Katakana: Written Guide (I used this): https://www.tofugu.com/japanese/learn-katakana another written guide by Tofugu.

Kanji and Vocabulary: Learning kanji is very important to become able to function in Japanese.

Wanikani is a subscription base Wanikani: https://wanikani.com/ (I use this/Not Free) It's about 10$

Offline: Anki: https://apps.ankiweb.net/ https://www.reddit.com/r/LearnJapanese/comments/3lhb36/recommended_japanese_anki_deck/

Grammar guides and textbook Online: This guide has a lot of activities for beginner Japanese learners: https://www.erin.jpf.go.jp/en/ Tae Kim's Guide to Learning Japanese: http://www.guidetojapanese.org/learn/ Bunpro https://bunpro.jp/summary (Not free)

Youtube Videos: Misa from Japanese Ammo: https://www.youtube.com/channel/UCBSyd8tXJoEJKIXfrwkPdbA

Textbook: GENKI: An Integrated Course in Elementary Japanese I [Second Edition] https://www.amazon.co.jp/GENKI-Integrated-Course-Elementary-Japanese/dp/4789014401/ref=sr_1_1?__mk_ja_JP=%E3%82%AB%E3%82%BF%E3%82%AB%E3%83%8A&keywords=genki+1&qid=1557673545&s=gateway&sr=8-1

Phonetics https://youtu.be/jakXVEUTT48

Kanji reading and common Japanese names reading: https://kanji.reader.bz/

Writing in Japanese on any device Tofugu guide: https://www.tofugu.com/japanese/how-to-type-in-japanese/

Japanese - English Dictionary Jisho: https://jisho.org/ Japanese analysis tool: http://nihongo.monash.edu/cgi-bin/wwwjdic?9T