Whisper.sh - Whisper is the best place to express yourself online. Connect with likeminded individuals and discover the unseen world around you.
Ask.fm - Curious? Just ask! Openly or anonymously.
Sayat - Sayat app is all about getting anonymous and honest feedback.
Retrospring - Q/A based social network
Sarahah - Sarahah is a Social Networking Application for providing anonymous feedback launched in 2016 and available to use on iOS and Android platforms.
Tellonym - Tellonym is the most honest place on the internet.