Ariadne2.isti.cnr.it
DATASET
BigQuery public datasets
Datasetlist.com
A list of datasets and annotation tools for machine learning from across the web.
DSC Data Science Search Engine
FiveThirtyEight
Kaggle
Search for anything on Kaggle.
OpenData by Socrata
Opensanctions.org
OpenSanctions helps investigators find leads, allows companies to manage risk and enables technologists to build data-driven products.