Archive of experimentally-determined, biological macromolecule 3-D structures from the Brookhaven National Laboratory.

Datgen, formerly SCDS, is a computer program that generates data to systematically test programs that consume data. These synthetic datasets can be used to validate learning algorithms.

Data for Evaluating Learning Valid Experiments: A standardized environment designed to evaluate the performance of methods that learn relationships based primarily on empirical data. Delve makes it possible for users to compare their learning methods with other methods on many datasets.

A repository of databases, domain theories and data generators that are used by the machine learning community for the empirical analysis of machine learning algorithms.

Text datasets used in information retrieval and learning in text domains.

Provides access to a wide variety of astrophysics, space physics, solar physics, lunar and planetary data from NASA space flight missions, in addition to selected other data and some models and software.

A repository of datasets used in statistics and machine learning.

This NIST database of fingerprint images contains 2000 8- bit gray scale fingerprint image pairs.

A dataset of face images for face recognition algorithms.

A collection of over 500 time series, maintained by Rob Hyndman. Time series are organized by subject.