Karen Purvis Institute of Child Development
Widely regarded as the foremost expert on attachment, trauma, abuse, and neglect, with a wide range of materials, resources, practitioners, and training. 

Robin Gobbel

Therapist who provides counseling worldwide, as well as resources, training, and workshops. 

Dr. Dan Siegel

Materials, events, online resources, blog, and an array of books and videos. 

Beyond Consequences Institute

Education and materials for parents, educators, mental health professionals, a store of materials, and events. 

Post Institute

Materials on parenting children with pre-birth and early life trauma, bookstudy, coaching, podcasts, and training programs.