Send instant messages, share files, and hold video conferences.
FaceTime for Mac makes it easy to talk, smile and laugh with friends and family on their iPhone 4, iPad 2, iPod touch or Mac.
Integrated communications client that enables you to communicate with contacts within and outside your organization.
Multi-protocols instant message client.
iMessage lets you send messages to anyone on a Mac, or an iPhone, iPad, or iPod touch running iOS 5.