Gumtree.com - Community Portal
Established in 2000 as a local London classified ads and community site, designed to connect people who were either planning to move, or had just arrived in the city, and needed help getting started with accommodation, employment and meeting new people.
Lost and Found Australia
We are the biggest Australian lost and found dogs, cats, rings and other items reunion service. Its free, has categories, subcategories and integration with maps. No registration required.