This document provides information about several data repositories and databases for research data, including CORE, European Data, UN Data, ICPSR, and CERN Open Data. For each one it lists some key features, such as CORE being a free search engine for academic publications and research papers that allows tracking citation counts, author profiles, and collaboration networks. European Data contains datasets, catalogues, news, stories and courses about open data. UN Data includes specialized databases, statistical tables, and datamarts covering various statistical themes. ICPSR is a data archive for social science research that lists several datasets. CERN Open Data endorses data citation principles and provides datasets with persistent identifiers.