data.cheap

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Collection of public datasets available for analysis on AWS.

Library of NLP datasets for machine learning.

US government's open data portal with datasets from federal agencies.

CKAN
Free

Open-source data portal platform used by governments and organizations worldwide.

Platform for finding, sharing, and publishing data.

Collection of databases, domain theories, and data generators for ML research.

Public computer vision datasets for machine learning.

OpenMLOpenMLFree

Collaborative platform for sharing datasets, algorithms, and experiments.

Data marketplace for acquiring and sharing data sets via Snowflake.

Public datasets hosted on Google Cloud's BigQuery platform.