Here are a few organizations and resources dedicated to aiding those who have lost a child or other loved one.

Children of the Dome — http://www.childrenofdome.com/

The Compassionate Friends — http://www.compassionatefriends.org/

Forever Family Foundation — http://www.foreverfamilyfoundation.org/

Survivors of Suicide — http://www.survivorsofsuicide.com/

For those who have lost a pet: Lightning Strike