Yad Vashem:
     http://www.yad-vashem.org.il/

Beth Hatefutsoth:
     http://www.bh.org.il/
 
The Ghetto Fighters' House:
     http://www.gfh.org.il/

Daat:
     http://www.daat.ac.il/
 
United States Holocaust Memorial Museum:
     http://www.ushmm.org/

The Nizkor Project:
     http://www.nizkor.org/

Simon Wiesenthal Center:
     http://www.wiesenthal.com/

Claims Conference:
     http://www.claimscon.org/

Remember.org:
     http://www.remember.org/

Holocaust Survivors:
     http://www.holocaustsurvivors.org/