An obvious clone of formsping.me ( Spring.me ), ask.fm offers creating a profile URL that can be addressed by others users with questions. If the settings allow this, questions can be asked anonymously, otherwise only questions that include...
Confessout helps you in receiving constructive honest feedback while maintaining privacy. You can send messages anonymously to anyone, receive a reply from anyone, and even reply to the messages sent by someone.
Social Fun - Secret Message allows you to receive anonymous messages from your friends anonymously. It’s you discovering your strengths and areas for improvement by receiving honest, constructive feedback from your employees and your friends.