Search for a Dataset - the Datahub

Add Dataset Import Data Package

Northern Ireland Neighbourhood Information Service (NINIS) Data Catalogue

About List of datasets is available as XLS file: Datasets_Available_On_Ninis.xls Re-use Click use license.
Human Mortality Database

About Detailed morality statistics from 37 countries. From the website: The Human Mortality Database (HMD) was created to provide detailed mortality and population data to...

You can also access this registry using the API (see API Docs).