Lipsi - This app is an often used app as an alternative for Sarahah.
Ask.fm - Curious? Just ask! Openly or anonymously.
Anossage - Chat anonymously and have fun with your friends, colleagues, and your crush, or with strangers.
Whisper.sh - Whisper is the best place to express yourself online. Connect with likeminded individuals and discover the unseen world around you.
Tellonym - Tellonym is the most honest place on the internet.
Anomsg.com - It's web based app where you can reply on anonymous messages and send videos or photos.