Peter Singer - arguably (not that I want an argument) the most important philosopher of the past forty years - will be teaching Practical Ethics on Coursera.
I subscribed to this course. I also recommend Moralities of everyday life by Paul Bloom which I'm currently taking and it's great. A Beginner's Guide to Irrational Behavior[1] starts soon and from reviews it looks like a great course.
[1] https://www.coursera.org/course/behavioralecon