unfriend – verb – To remove someone as a ‘friend’ on a social networking site such as Facebook.The Facebook, the most popular social networking site, doesn't offer a straight forward way to figure out who removed you there.
The "Catch Who Didn't Match You" application caters exactly that. Currently it's running on WSO2 StrtosLive PAAS and backed by a highly scalable cassandra NoSQL data store - available via http://tinyurl.com/stratos-unfriend.
