Mac Apps for Communications
Top 3 Communications Apps for Mac
More Communications Apps for Mac

WhatsApp
FreeWhatsApp app on your Mac
Mac
Discord
FreeObtain power to create your own place to belong and share it with explicit soulmates you invite.
Mac
Skype
FreeStay within the reach with free Skype-to-Skype video/audio calls, videoconferencing, smart messaging, and screen sharing.
Mac
Colloquy
Trial versionQuality IRC & SILC client with style.
MacProteus
Freeinstant messaging client for most major IM services
MacZoom Workplace
FreeMacWeChat
FreeMacTextNow - Free Text
FreeMac
Feem
FreeChat and transfer files with other people in your WiFi or local network.
MacAsterisk
FreeTurn Mac OS X into a PBX and VoIP telephony server.
MacApple Messages
FreeDownload Messages Beta and get a taste of what's coming in OS X Mountain Lion. When you install Messages, it replaces iChat. But iChat services will continue to work.
MacIP Reporter (OS X)
Trial versionFind and display your current IP number.
MacNetSpeedometer
FreeMonitor and display your Internet connection speed in form of a graphic.
Mac
Mail Designer 365
Trial versionCreate HTML e-mails and newsletters without any HTML coding.
MacKiwi for Gmail
FreeAccess each application, open new documents, and get back to recent documents with a single click.
MacEvoCam
Trial versionStream live video to websites.
MacSpamSieve
Trial versionBayesian spam filter for most email clients.
Mac
Apple FaceTime
PaidMake video calls to iPhone 4, the new iPod touch, or another Mac.
Mac
AOL Desktop for Mac
FreeAll-in-one AOL client with integrated mail, AIM, browser.
Mac
TorChat
FreeChat in anonymous rooms without getting located.
MacSnap Camera
FreeMac
Telegram
FreeChat in private and group chats, share photos and videos and stay connected with everyone at once.
MacWebPeek
Trial versionTake screenshots on your Mac remotely via any Web browser.
Mac
Sky Mac
FreeMake business calls and chat with your partners easily.
Mac