Messenger for Mac - Facebook Messenger wrapped up as a desktop app
OurPact - Parental Control for apps and devices
Chat for Mac - Facebook Messenger & Chat on your Mac
FamilyTime - FamilyTime is one of the best parental controlling application and family tracking application and finder at the moment available over the internet.
Chatty - Chat with strangers all around the world in Messenger
Kidslox - Set boundaries for your kids