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There is a (hillariously named) alternative noodle [1] that aims to compete in this space. It is under development but looks polished.

Noodle is a task management app for students, not an LMS : )

Oh, my bad. Sorry. From the focus on education and the name I assumed it was an lms

From the looks of the UI shown on the homepage, it accomplishes the same thing as Moodle does from the students perspective