Japanese learners:

The Japan Foundation started publishing new free books for learning Japanese! They include grammar, dialogs, listening practice, exercises etc.

2 books with 18 lessons each are already available:
https://irodori.jpf.go.jp/en/index.html 

Twitter messed up the link when I posted it... the url needs the www. to work properly.

Here is a working link in tinyurl: https://tinyurl.com/ual86yz 

I'm glad so many people find this useful! I'm currently working on a blog post with many more Japanese resources (most of them for free) and will post it soon!

In case something is still watching this thread, I posted my Japanese resources on my blog: https://twitter.com/wordcat/status/1247937474900439043