- https://www.opendatanetwork.com - The “Google, for Socrata datasets”
- https://public.enigma.com - One of the best collections of U.S. federal data, with good taxonomy and lots of useful options for refining a search, such as filtering by dataset size.
- https://toolbox.google.com/datasetsearch - Google Dataset Search
- https://datasearch.elsevier.com - Research Data
- https://objectnet.dev - New kind of vision dataset for object detection, much harder than ImageNet.
- https://rajpurkar.github.io/SQuAD-explorer - Stanford Question Answering Dataset. Crowed sources answerable questions and answers, along with unanswerable questions.