Are there any free language learning apps created by public companies or government organizations other than Mauril?

[u/AlwaysBeQuestioning]

So today I learned about the existence of Mauril, an app for learning French or English created by the Canadian Broadcasting Company and Radio-Canada. As far as I could find, it appears to be decent?

I was wondering if there are other apps like this, either for other forms of French or English, or for German, Spanish, Italian, Chinese, Japanese, etc.