No specific info about version 6.3. Please visit the main page of DingTalk on Mac Informer.
iMessage lets you send messages to anyone on a Mac, or an iPhone, iPad, or iPod touch running iOS 5.
Send messages, exchange files, and make voice and video calls.
Allows you to communicate and share files with others.
An unofficial and privacy-focused Facebook Messenger application.
Use Facebook Messenger right from your macOS desktop.