The founder of Powerset search engine, Barney Pell has unveiled a Facebook application called “Unfriender“, with the help of a developer Siqi Chen, who co-created the popular Facebook app called Friends For Sale!.

Unfriender is actually an app that help you to keep inform when people you have added as friends on Facebook that have removed you from their friends list. For instance, Facebook will not send an alert to you when someone removes you as a friend, however Unfriender’s feature will let you know about this by posting a notification to you.

I am trying to access Unfriender to get a glimpse of it, unfortunately it is not available at the time of my writing.