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Platform for sharing datasets and facilitating collaborations. Includes a social network component.

Repository of multimodal archived data from websites and uploaded individually. Includes a variety of data: websites, books, videos, audio, television, software, images, concerts, and collections.

List of datasets divided by data type: image data, text data, sound data, signal data, physical data, biological data, anomaly data, and multivariate data. Intended to help machine learning data.

Stack Exchange for the discussion and publicizing of open data.

List of individual datasets that were created as open data jobs on Crowdflower; includes whole datasets and subsets of datasets created under these jobs

Repository of more than 1600 individual datasets on a range of metrics about New York City (NY), including datasets on health, housing, public safety, and more

Repository of individual datasets on a range of metrics about Oakland (CA), including datasets on health, housing, public safety, and more

Various datasets from institutions and other entities within the European Union

A subreddit (i.e., message board for a single topic on reddit.com) about datasets, including requests for datasets and notifications about dataset

Publicly available datasets (and, when available, related scripts)