http://datacatalogs.org/

About DataCatalogs.orgDataCatalogs.org is the most comprehensive list of open data catalogs in the world. It is curated by a group of leading open data experts from around the world - including representatives from local, regional and national governments, international organisations such as the World Bank, and numerous NGOs.

The alpha version of DataCatalogs.org was launched at OKCon 2011 in Berlin. We have plenty of useful improvements and features in the pipeline, which will be launched over the coming months.

If you have an idea for something you think we should add, please let us know on the data-catalogs list. If you're interested talking to other people interested in open government data, you can join the open-government list or follow #opendata on Twitter.