This list does not imply an endorsement of the views expressed in any of these sources.

ICRC - International Law Database of the International Committee of the Red Cross
Incore: Guide to Internet Sources on Truth, Reconciliation, and Conflict
Transitional Justice Data Base Project
USIP - United States Institute of Peace: Truth Commissions Digital Collection
The Hague Justice Portal

Avalon Project at Yale Law School: Documents in Law, History and Diplomacy
Cambodian Genocide Program at Yale University
Forschungs- und Dokumentationszentrum für Kriegsverbrecherprozesse der Philips-Universität Marburg (only german)
War Crimes Studies Center (WCSC) at the University of Berkeley