American Red Cross Bay Area Chapter
Restoring Family Links Program provides resources for emergencies including emergency messaging, and re-connecting families separated by armed conflicts and other international crises.
http://www.redcross.org/what-we-do/international-services/reconnecting-families

 

Refugees United
A non-profit organization which provides a safe, secure and anonymous way to find missing family and friends that is free of charge and allows refugees to directly reconnect from anywhere in the world that there is android, mobile, or web search capability. For those who fear persecution, registration and use allow for full anonymity. Service now found in many refugee camps worldwide with partners such as the UNHCR. Refugees United does not facilitate physical reunifications.
http://www.refunite.org/