There's a lot of overlap with Spawned Shelter, and I haven't touched it in a few months, but https://gist.github.com/macintux/6349828 is a list of free Erlang resources I try to maintain.
I was not aware about Spawned Shelter and your list of resources wow, I need to check the first be as soon as I click on your link I needed to write you some thanks message! awesome job with the list.