Ask.fm - Curious? Just ask! Openly or anonymously.
Chancetime - Interviews in front of the world
Whisper.sh - Whisper is the best place to express yourself online. Connect with likeminded individuals and discover the unseen world around you.
Yastalk - Receive honest feedbacks from your co-workers, friends or knowns
Lipsi - This app is an often used app as an alternative for Sarahah.
Zabuu - Anonymous questions can also be from the follow-up list.