Datasets for Economics
Our World in Data: a general data aggregator, with interactive charts
Gapminder: a general data aggregator, with interactive charts
Human Progress: a general data aggregator, with interactive charts
Penn World Table | Groningen Growth and Development Centre: a macroeconomic data aggregator
Federal Reserve Economic Data | FRED: a macroeconomic data aggregator, with interactive charts
Global Macroeconomic Database: a macroeconomic data aggregator
Economic Policy Uncertainty: data on macroeconomic economic policy uncertainty
Maddison Historical Statistics | Historical Development | Groningen Growth and Development Centre: historical macroeconomic data
MEDevEcon - Macro data: macroeconomic development data
IMF Data: the IMF's data portal
World Bank Open Data | Data: the World Bank's data portal
The Polity Project: political regimes data
Barro Lee Data Set: educational attainment data
UNU-WIDER : Data: economic inequality data
The World Factbook: individual country information
https://www.bls.gov/ : U.S. Bureau of Labor Statistics contains information about U.S. labor bureau.
https://www.eia.gov/ : U.S. Energy Information Administration
https://www.noaa.gov/weather : National Oceanic and Atmospheric Administration
https://www.census.gov/ : U.S. Census Bureau
https://www.epa.gov/outdoor-air-quality-data : U.S. Air Quality Data
Indian data
Data.gov in https://www.data.gov.in/search?title=NFHS%20data&type=resources&sortby=_score
Central Electricity Authority https://cea.nic.in/?lang=en (for energy data in India)