Our world in data https://ourworldindata.org/
Kaggle https://www.kaggle.com/datasets
Data portals https://dataportals.org/
UN Data https://data.un.org/
Data world bank https://data.worldbank.org/
Eurostat https://ec.europa.eu/eurostat/data/database
Mapstack.io https://mapstack.io/search
Knb https://knb.ecoinformatics.org/data
Leeds
Data Mill North https://datamillnorth.org/dataset