The research & publications of reputable think tanks, NGOs, and policy organisations, is often an important complement to academic literature (books and journal articles), especially for research topics that have policy dimensions relating to mental health, refugees, children, etc.

Especially useful are the main portals to the output of these organisations: Overton Policy Documents; Harvard Think Tank Search; Policy Commons

See also the links in the sections below to specialist organisations in each field (Children, Mental Health, etc.)