I love being able to add links to the website list (or app list). If you have any suggestions, please send them along and help us all out!
I just added the blog of “That Japanese Man Yuta” to the website list. A lot of his site is more about culture than language, but there is some good language stuff there, too. (Just as an aside, he seems to spend a lot of time talking about dating.)
He also has a YouTube channel which you can find right here. The channel contains some language instruction, but it also contains a lot of “social experiments”.
To be honest, the reason he’s on here is that I signed up for his free (ただ – hooray!) email lessons. Periodically he send you by email a link to an instructional video. FYI, here’s the one I just got: how to say You in Japanese.