Humanitarian Data Exchange
data.humdata.org
OCHA's open platform hosting thousands of datasets on crises, displacement, food security, and health emergencies from UN agencies, NGOs, and governments — all freely downloadable.
Why it is useful
The primary open data source for humanitarian crises — refugee populations, food insecurity levels, health facility locations, conflict incident maps. If you're doing research on developing regions, conflict zones, or emergency response, HDX often has data that doesn't exist anywhere else. All datasets are freely downloadable with standardized licensing. Trusted by humanitarian organizations worldwide.