Archguide: Directory of international arctitecture resources, links, competitions and reviews.
Architecture and Building: A directory of sites, arranged into categories, with an alphabetical index by site titles, compiled by Jeanne Brown, librarian at the University of Nevada.
Architecture Links: Searchable listing of architecture and construction links, plus competitions news, jobs and events, from Bristol and Bath RIBA.
Art, Design, Architecture and Media Information Gateway: ADAM is a searchable catalogue of over 2000 Internet resources catalogued by professional librarians for the UK higher education community.
Sapling.info: Architecture, planning and landscape information gateway.
Vitruvio: Directory of links to architects and architectural history.