Kristian S. Gleditsch Data Projects - Excellent collection of economic and political data.
UCDP Data Program - Systematic information on various aspects of armed conflict.
Political Terror Scale - Data on physical integrity rights violations worldwide.
Political Instability Task Force - Systematic information on internal wars and genocides from 1955 onwards.
Genocide Prevention Advisory Network - International network of scholars that study 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 - Great respiratory for Stata code.