Samsung have released a list of their Top 20 most popular Tizen apps in March 2015'. The company previously did a similar thing for February 2015 (I can see a tend starting now).
WhatsApp and Opera Mini web browser are maintaining their first and second place positions respectively. Third position is McAffee Free Antivirus and security, which demonstrates how important it is to be virus and malware free. Most of the apps are created by Indie developers that want another ecosystem to be found in.
Have you ported your App to Tizen yet?