Csinvesting-A Reader’s Question On Niche Vs Moat and Greenwald Class Notes. Make sure to read all the way to the comments as there is a very good discussion going on about moats there.
Fundoo Professor-Presentation on Moats and Floats. Decided to post this again because it is so important. Also read the comments section.
25iq.com-Charlie Munger On Moats (First Of The Four Essential Filters). Extremely valuable read for people learning about moats as I am right now. Also contains a bunch of links to other Munger and moat information.