Private Investigations for the Missing
A non profit 501 C organization which supplies private investigators to families of missing persons at no cost to them.
The National Missing and Unidentified Persons System (NamUs) is a national information clearinghouse and resource center for missing, unidentified, and unclaimed person cases across the United States. 
The Charley Project
The Charley Project profiles over 14,000 “cold case” missing people mainly from the United States. It does not actively investigate cases; it is merely a publicity vehicle for missing people who are often neglected by the press and forgotten all too soon. A person must have been missing for at least one year to be listed; see the FAQ for additional information on the site, its goals, and its founder/administrator.
DNA solves
DNASolves® is solely focused on enabling human identification for law enforcement investigations. The limited scope of use (we do not offer genealogy or health tools), combined with limited access (law enforcement only), allows us to achieve this mission while maximizing privacy and security.
FBI kidnapped and Missing persons site
Photos and information on kidnapped and missing persons.
National Center for Missing and Exploited Children
NCMEC is the nation’s largest and most influential child protection organization. We lead the fight to protect children, creating vital resources for them and the people who keep them safe.