DataPortals.org: A Global Catalogue of Public Domain Data Portals
The DataPortals.org site, hosted by the Open Knowledge International organisation in conjunction with the LOD2 project, provides a comprehensive repository of over 500 open data portals. The registered portals, published by local, regional and national governments, international organisations and a number of Non Government Organisations (NGOs), provide access to a variety of spatial data sources including administrative boundaries, land use, economic activity and environmental indicators.
All data sets referenced by the DataPortals catalogue, including those that form part of a database collection, are published under the Open Data Commons Public Domain Dedication & Licence. The data sets are available to download in a variety of formats including .xls, JSON/GEOJSON and shapefile.