Directories

Diggers & Dreamers - The Guide to Communal Living in Britain
Book is a directory of communities in Great Britain, including intentional communities, cohousing projects, housing co-operatives, eco-villages and utopian lifestyles. Site also contains searchable database of the communities, articles, FAQs, and links.
http://www.diggersanddreamers.org.uk/

Eurotopia
Intentional communities and ecovillages in Europe
http://www.eurotopia.de