"This website is intended to both as a guide to published sources drawn primarily from the Correlates of War data sets as well as various non-COW datasets available through the internet. Towards that end, a bibliography of articles and books by Correlates of War researchers is provided along with a page of links to quantitative international relations data."
George Mason University site with data on conflict regions, direct military intervention, political interaction events, bilateral trade flows, memberships in conventional inter-governmental organizations, forcibly dislocated populations, political instability, state fragility, genocide, and arms trade.
From the University of Maryland. Interactive database gives information on "the status and conflicts of politically-active communal groups in all countries with a current population of at least 500,000."
Political Instability Task Force is a "panel of scholars and methodologists that was originally formed in 1994 at the request of senior policymakers in the United States Government. The composition of the core group of scholars numbers from ten to fifteen and represents several of the country's leading research institutions; current Task Force members come from Arizona State, Columbia, George Mason, Harvard, Maryland, Minnesota, Stanford, and Texas universities."
U.S. Department of Homeland Security based at the University of Maryland. GTD "is an open-source database including information on terrorist events around the world from 1970 through 2015 (with annual updates planned for the future). Unlike many other event databases, the GTD includes systematic data on domestic as well as international terrorist incidents that have occurred during this time period and now includes more than 87,000 cases."