32 free resources
niku
Tim Morgan
Kamil Skowron
Ryan Bigg (HTML)
Joseph Kain Blog
Compiled from StackOverflow Documentation
Bruce Park
Dashbit (PDF) (email address *required*)
Elvio Vicosa (PDF) *( :card_file_box: archived)*
Victor Oliveira Nascimento
Universidade Brasileira Livre
Alquimia Stone
Elly Academy
Yuri Zhloba
Ilya Krukowski
Brooklin Myers
Josh Adams
Alekx
Confreaks
Erlang Solutions
Tensor Programming
Cade Ward (podcast)