Most recently I have found an application on orkut which helps human community. Yes, blood search is an application to enable users to search blood in their network of friends. Unfortunately, there is no region-wise search of users who are willing to donate blood, but introduce this application to your orkut friends so you can help others and also you may be helped by others when in need. This is... 

If you are an Ubuntian (Ubuntu user), you’ve probably known Ubuntu updates its software versions every six months with a new release. Mostly, Mozilla, upgrades Firefox / Thunderbird often with security patches or new features-based releases. Ubuntu often includes security patches with its own versions in a day or a week after Mozilla releases their patches, but many Ubuntians are impatient...