Ask.fm - Curious? Just ask! Openly or anonymously.
Tellonym - Tellonym is the most honest place on the internet.
Zaqa - Zaqa is a Question & Answer based social networking tool.
Whisper.sh - Whisper is the best place to express yourself online. Connect with likeminded individuals and discover the unseen world around you.
Chancetime - Interviews in front of the world
Sayat - Sayat app is all about getting anonymous and honest feedback.