World Bank (multiple indicators)

https://data.worldbank.org/indicator

World Bank – World Development Indicators (WDI)

https://datacatalog.worldbank.org/dataset/world-development-indicators

United Nations – Monthly Bulletin of Statistics

https://unstats.un.org/unsd/mbs/app/DataSearchTable.aspx

International Monetary Fund (IMF)

https://www.imf.org/en/Data

Organization for Economic Cooperation and Development (OECD)

https://data.oecd.org/

https://data.oecd.org/searchresults/?r=+f/type/datasets

World Trade Organization (WTO) – Trade and tariffs

https://www.wto.org/english/res_e/statis_e/Statis_e.htm

United Nations Conference on Trade and Development (UNCTAD) – Multiple

https://unctadstat.unctad.org/wds/ReportFolders/reportFolders.aspx?sCS_ChosenLang=en

World Bank – Worldwide Governance Indicators (WGI)

https://datacatalog.worldbank.org/dataset/worldwide-governance-indicators

Polity IV Project

http://www.systemicpeace.org/polity/polity4.htm

Uppsala Conflict Data Program (UCDP)

https://www.pcr.uu.se/research/ucdp/

United Nations – Comtrade

https://comtrade.un.org/

Correlates of War Project (CoW) – Conflict, alliances, territorial change, diplomacy, and more

http://www.correlatesofwar.org/data-sets