Beyond Blue: The Australian National Depression initiative
Wikipedia on: Major depressive disorder
Wikipedia on: Depression (mood)
US National Institute of Mental Health website with a good Depression FAQ
Online Depression Screening Test from Mental Health America
Medline Plus Health Topics: Depression
National Alliance on Mental Illness (NAMI) Depression Fact Sheets
TeensHealth Depression information for Teens
Dr.Ivan’s DEPRESSION CENTRAL: This site is the Internet's central clearinghouse for information on all types of depressive disorders and on the most effective treatments for individuals suffering from all forms of depression:
WebMD Depression Health Centre
Huegio’s Happiness Process: A fast and easy Spiritual Approach