Property Listings:

Home - http://www.home.co.uk/
Searchable database of properties. Provides a facility for its users to advertise their property for private sale.

Period Property UK - http://www.periodproperty.co.uk
Provides listings of period properties for sale, home improvement advice and restoration services for old houses and listed buildings.

Property Secrets - http://www.propertysecrets.net/
Sells property investment books, newsletters and tips.

A Property in Greece - http://www.apropertyingreece.com/
A UK-based agency offering property for sale in Crete, Rhodes and some smaller Greek islands; includes profile, property lists plus design and build information.

Hellenic Realty - http://www.hellenic-realty.com
A real estate agency marketing properties for sale in Greece including traditional stone houses, sea front apartments and plots.