https://jisho.org/ Most commonly used online Japanese-English dictionary.
https://marugotoweb.jp/en/ This website consists of different levels of beginners Japanese learners to interact with the language of Japanese both visually (recognizing Japanese alphabets and characters), audibly, and vocally.
http://genki.japantimes.co.jp/self/verbadjective-conjugation-practice This website is aimed for intermediate Japanese learners, where users are asked to type in the answers of a very simple/short question.
http://www.bunka.go.jp/seisaku/kokugo_nihongo/kokugo_shisaku/keigo/index.html For those who are interested in the Keigo form of Japanese, this is a website where they teach you how and when to use the correct form of Keigo by demonstrating in a video. The website is in Japanese, but the video may be helpful for you!
https://www.iwillteachyoualanguage.com/learn/japanese/japanese-tips/basic-japanese-phrases Japanese basic conversations and expressions that can be useful when to initiate an easy conversation.
https://www.rocketlanguages.com/japanese/lessons/directions-in-japanese Learning about directions in Japanese. Japanese 101 class students had questions about expressing directions, so this is the material
Katakana/Hiragana Practice PDF Pages 3-12: hiragana practice, 13-16: hiragana word practice, 17: katakana chart, 18-27: katakana practice, 33-52: double-sided flashcards
https://kotobaweb.com/kanjigame/create A website that helps with reading kanji in game format. Shiritori game also featured. For all Japanese learning levels. Everything should be free
https://www3.nhk.or.jp/news/easy/ This is where you can read the news with furigana and it is written in more simple and easy sentences which intermediate level Japanese readers can improve reading and vocabulary.