http://www.carebricks.com
Everyone can post properties for sale or lease online for free. Carebricks has afforded everyone this opportunity irrespective of whether you are a real-estate agent or you are the property owner, you can just post your properties on their site on their site for free.
Moreover if you are interested in getting notifications on properties available for lease or purchase you can also register on their site as a Real Property Searcher (RPS).
Their site can be found at http://www.carebricks.com.