Neighbourly by Google is a Q&A app for your neighborhood, currently in beta in India.
Tris is the newest way to browse and search the Internet. TRIS= The Revolution In Search. You can now talk to others searching the same keyword as you. Even browsing the same website as you. Tris makes the entire Internet social. We started with out Chrome extension at www.tris.com/extension where you can even get notifications of searches