Search Engines

• 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://datahub.io
• https://datasearch.elsevier.com - Research Data

APIs

• https://github.com/toddmotto/public-apis

Meta Lists

• http://cooldatasets.com
• https://github.com/caesar0301/awesome-public-datasets
• https://www.kaggle.com/datasets

Images

• https://objectnet.dev - New kind of vision dataset for object detection, much harder than ImageNet.

NLP

• https://rajpurkar.github.io/SQuAD-explorer - Stanford Question Answering Dataset. Crowed sources answerable questions and answers, along with unanswerable questions.