Armed Conflict Location & Event Data (ACLED) - Data on violent conflict and protests
Correlates of War (COW) Project - Conflict data
Peace Research Institute Oslo PRIO - Peace and conflict data
Peace Research Institute Oslo (PRIO) Grid - Spatial data in grid structure
Social Conflict Analysis Database (SCAD) - Data on protests, riots, strikes, inter-communal conflict, government violence against civilians, and other forms of social conflict not systematically tracked in other conflict datasets.
Uppsala Conflict Data Program - Data on conflict and other violent phenomena
Our World in Data - Indicators for a broad range of topics presented in a student-friendly way