Directory of Open Access Repositories (OpenDOAR): OpenDOAR is the quality-assured global directory of academic open access repositories. It enables the identification, browsing and search for repositories, based on a range of features, such as location, software or type of material held
Registry of Open Access Repositories (ROAR): ROAR is to promote the development of open access by providing timely information about the growth and status of repositories throughout the world.
re3data provides detailed information about over 2,000 research data repositories.
Platform Specific Registries
DSpace User Registry is a searchable repository listing of dspace platforms around the world