Kaggle https://www.kaggle.com/datasets
Huggin Face https://huggingface.co/datasets
Dataset Search Google https://datasetsearch.research.google.com/
FiveThirtyEight https://data.fivethirtyeight.com/
Data https://catalog.data.gov/dataset/ (An official website of the United States government)
GitHub https://github.com/awesomedata/awesome-public-datasets
NASA's Open Data Portal https://data.nasa.gov/browse?sortBy=newest&page=1&pageSize=20
reddit https://www.reddit.com/r/datasets/?rdt=47605
Mendeley Data https://data.mendeley.com/research-data/?type=DATASET
UC Irvine Machine Learning repository https://archive.ics.uci.edu/datasets