An new online Esperanto course for komoncantoj ;)
Esperanto in 12 days, available in many languages
if you want to contribute it's available on GitHub
See also this thread:
and this link
Actually, I was looking for this site. Dankon!
Last time I saw this, it was only in English, so it is nice to see they made it for other languages too:)
There are some mistakes. Some very confusing ones for new learners. They will legitimately learn incorrect words such as using "amikino" to represent a romantic girlfriend instead of koramikino.