Go Sydney City - Comprehensive guide to Sydney including accommodation, e-postcards, and local services. - http://www.gosydneycity.com/
BDC Top Art & Food - Offers detailed guide to Sydney, covers art galleries, museums, libraries, performing arts, restaurants and hotels. - http://www.topartandfood.com
Sydney City Net. - Links, accommodation and historical information. - http://www.sydneycity.net/
Sydney.com.au - Accommodation, sights, getting around and other resources. - http://www.sydney.com.au/