NB :: Not all the DB's are freely available.
Crystallography
Genome
General Datasets
- Freebase :: A community-curated database of well-known people, places, and things.
- World Bank Open Data :: Free and open access to data about development in countries around the globe.
Genetics-Medicine
Machine Learning
Molecular Biology
- SASBDB ::Small Angle Scattering Biological Data Bank.
Neuroscience
- OpenfMRI.org :: is a project dedicated to the free and open sharing of functional magnetic resonance imaging (fMRI) datasets, including raw data.
- Neuroscience Databases list.
- Neurovault :: A place where researchers can publicly store and share unthresholded statistical maps produced by MRI and PET studies.
NLP
Pharma
Research Data
- Registry of Research Data Repositories :: provides researchers, funding organisations, libraries and publishers with over 1,000 listed research data repositories from all over the world making it the largest and most comprehensive online catalog of research data repositories on the web.
Scientific Databases