A topic near and dear to me:
https://class.coursera.org/physicalchemistry-001
Origin: University of Manchester, UK; lecture sequence starting as of today.
After reviewing the first couple of lectures, I'll describe this course as being at a quite reasonable level. You can probably go a long way with it even without having mastered basic calculus, but to get beneath the superficial phenomenology of it, a bit of maths is going to be necessary.