Erlang code worth reading

Hey, everyone. I'm just trying to learn some erlang, I'm working through Joe Armstrong's "Programming Erlang", which I like quite a lot, so far. BUT it would be nice to have some real world code to read as well. As I am not much more than a beginner in functional programming, this would benefit me greatly. So, my question is: what are noteworthy pieces of free erlang code on the internet? Does anyone have suggestions? thanks!