Kristian S. Gleditsch Data Projects - Professor Gleditsch provides free access too all data sources he has published up to date.
UCDP Data Program - this program collects information on a large number of aspects of armed violence across countries since 1946.
Political Terror Scale - a yearly report measuring physical integrity rights violations worldwide.
Political Instability Task Force - this program collects information on internal wars and failures of governance from 1955-To present.
Genocide Prevention Advisory Network - international network of experts on the causes, consequences, and prevention of genocide.
Human Rights Data Analysis Group - a non-profit organization that recalls and analyses human rights violations around the world.
Dr Matt Golder has an excellent website he shares useful Stata code.