Public

• Common Crawl - Massive archive of web data for NLP and machine learning.
• Data.gov - Open data from the U.S. government.
• Datahub.io - Platform for finding, sharing, and publishing data.
• Earth Data - NASA's repository of Earth science data.
• Eurostat - European social, economic, and population data.
• Freesound - Collaborative database of audio samples and music data.
• Gapminder - Global development data on health, wealth, and population.
• Google Dataset Search - Search engine for datasets across the web.
• Hugging Face Datasets - NLP and machine learning datasets.
• IMDb Datasets - Movie, TV show, and actor information.
• Kaggle Datasets - Vast collection of public datasets.
• NOAA Climate Data Online - Weather and climate data.
• Our World in Data - Research data on global problems.
• Quandl - Financial, economic, and alternative datasets.
• TensorFlow Datasets - Ready-to-use datasets for machine learning.
• UCI Machine Learning Repository - High-quality datasets for machine learning.
• UK Data Service - UK’s largest collection of social and economic data.
• USGS Earth Explorer - Earth science data including satellite imagery.
• World Bank Open Data - Global development data.

Specialized Datasets

• NCI Cancer Data - Medical datasets for cancer research.
• Energy Star Data - Electricity and energy efficiency datasets.
• FCC Data - Telecommunication data from the U.S. Federal Communications Commission.
• COCO Dataset - Image dataset for object detection and segmentation in machine learning.