Built on PHP, over-engineered, and terrible out-of-the-box UI. I wouldn't personally recommend Moodle, unless you had no other option. It takes all of my energy

Built on PHP, over-engineered, and terrible out-of-the-box UI. I wouldn't personally recommend Moodle, unless you had no other option. It takes all of my energy to resist suggesting you just write your own LMS from scratch instead of using Moodle...