From an Open Knowledge Foundation Blog Post by Friedrich Lindenberg (Developer at the Open Knowledge Foundation working on CKAN, PublicData.eu and Open Spending):
Recently, there has hardly been a week in which there hasn’t been an announcement of a new local, regional or national open data initiative – including ever more extensive catalogues of data that is being opened up (CKAN alone now runs in 20 or more places). While this is great news for those of us interested in re-using the data, it also means it becomes increasingly hard to keep a good overview of what kind of data are available for which places. To get a better overview we’ve now started a meta search engine for open data, opendatasearch.org.
opendatasearch.org is a global version of the prototype publicdata.eu site we announced in January: it’s an aggregator for datasets, providing a simple and unified search interface to all of the catalogues contained. At the moment, this includes all known instances of the CKAN software, the Sunlight Foundation’s National Data Catalog (and with it a large number of US-based data sources), the World Bank data catalogue, Sweden’s DCat-enabled OpenGov.se and Nexedi’s Data Publica portal. We’ve also put up search.ckan.net which provides access to the combined index of all CKANs only.