I will update this list as soon as I find more useful materials online (undeniably FREE to learn, really) so this is quite mostly for adaptive learners who can self-study. But I can help you understand some so don't hesitate to contact me on my Twitter! I'd love to help at most I can possibly give. I'm currently learning to speak Japanese with a few Japanese study buddies I help in learning to speak English too. (´｡• ᵕ •｡`)

Japanese learning materials

• Tae Kim's Guide to Japanese (a very good place to start!)
  • Learning Japanese app from Tae Kim's Guide (app version)
• Maggie Sensei (so many new vocab to learn here!)
• NHK World’s Online Japanese Lessons
  • NHK News Web Easy (when you want to practice reading Japanese texts or you can understand some Japanese)
  • NHK Japan-Easy (when you want to practice your listening skill in Japanese)
• LingoDeer (choose Japanese and you're good to go into basics!)
• Tofugu (a good place learning about Japanese culture, language, and such.)
• Nihongo Gold Games (have a little fun!)
• Japanese Test For You (challenge yourself!)
• WaniKani (best site for understanding Kanji radicals and vocabulary!)
• Erin's Challenge! I can speak Japanese. | The Japan Foundation (have so many helpful videos!)
• JF Japanese e-Learning Minato | The Japan Foundation (very creative place to learn Japanese with tutors to have feedbacks!)
• DICTIONARIES on-the-go
  • Jisho.org (Website)
  • Takoboto (Android)
• Japanese IO (Chrome extension I use to read various Kanji!; PC only)

Korean learning materials

• How to Study Korean (a very good place to start!)
• Memrise (Android; my favorite place to have fun with Korean vocabulary)
• Naver Dictionary in English & Translator (Website)
  • Guide to Naver Dictionary website (Guide from my fave early-bunny ARMY: Skye-tokki님)
• Korean From Zero
  • A very good books for learning Korean by reading, writing and listening. You should download their audio files too!
• I recommend LingoDeer also for Korean basics!

English learning materials

Note: This is not a "from the beginning" resources but I'll be sharing sites or apps that can help to improve your English reading, understanding and to widen more of your vocabulary. I love to study complicated English (Filipino too!) in terms of grammar so these are the sites I've been keeping since to learn more about the world, by expanding my vocabulary in English too! So these are widely intended for those who already knows English and wanted to expand more of their vocabulary. :D

• Quora (I've been an avid reader of people of Quora's interesting answers for 4 years and still surprise me every single day! It's like a Reader's Digest in the modern and digital world but not monthly XD If you had collected Reader's Digest books since '90s, those subscriptions are really interesting to read!!)
• Vocabulary.com (fave site!)
• Vocabulary Builder (fave Android vocab app)
• Improve English: Word Games (fave two, Android)
• Curiosity (new articles to be curious of, everyday!)
• Reddit (a huge community that you will keep going back, no matter what!)
• Merriam-Webster Dictionary (a very good dictionary that helping me throughout my studies too)
  • We actually have this huge dictionary at home and it's very heavy and bulky, so this is the advantages of modern digital world, no need to sacrifice buying heavy ones! :D (I still love that dictionary because it has history profiles, country flags, and American presidents too! Too many to mention~)
  • Another note: As for dictionaries, always go for handy ones because convenience is important to this busy world. I'd remember I'll always brought my two dictionaries at school since elementary and when there's free time, I'll read my dictionaries until it's time :D Just another tip!

If you'd like to have a study buddy in the language you wish to learn, try HelloTalk app to communicate with other students who are learning your native language and in that way, you can help each other learning the language! You can also have a good friend keeping in touch with you! I really recommend this because of the features of correcting your sentences and sharing moments so it's a little community you're engaging with. See it for yourself! Just keep the conversation going with different topics but be careful asking personal matters~!

That's it for now~ When you're looking for other sites or apps that (as for you) is better, stick with it! This is my personal preferences as I continue to study. I actually don't have a specific schedule because I can't keep my brain into that rapid memorization because I'd like to have it in my long-term memory! All resources in this list is FREE and I didn't put those who have price tags with it. Learning is a ground-zero that you will keep doing 'til you're dead. (Take this quote from me!) Don't be afraid to ask someone who knows what you're trying to learn and learn to listen to advises but listen more to what you are capable of. There's no success if there's no failure! Carpe diem!

P.S. This is not sponsored so you're good to go! ☆ヾ(*´・∀・)ﾉヾ(・∀・`*)ﾉ☆