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

Gmail Notifier
FreeCheck your Gmail account without opening your browser.
MacSnap Camera
FreeMac
Skype
FreeStay within the reach with free Skype-to-Skype video/audio calls, videoconferencing, smart messaging, and screen sharing.
MacProteus
Freeinstant messaging client for most major IM services
Mac
AOL Desktop for Mac
FreeAll-in-one AOL client with integrated mail, AIM, browser.
Mac
Colloquy
Trial versionQuality IRC & SILC client with style.
MacFacebook Desktop
FreeMacWeChat
FreeMac
Telegram
FreeChat in private and group chats, share photos and videos and stay connected with everyone at once.
MacSignal
FreeSend high-quality messages anywhere in the world without SMS or MMS fees.
Mac
WhatsApp
FreeWhatsApp app on your Mac
MacZoom Workplace
FreeMac
Viber
FreeSend free messages and make free calls to other Viber users, on any device and network, in any country.
Mac
iSoftPhone Pro
Trial versionAdvanced softphone with video.
MacTwitch
FreeMac
MSG Viewer for Outlook
Trial versionOutlook message viewer for Mac users
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.
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.
Mac
EOS Webcam Utility
FreeTurn your compatible Canon camera into a high-quality Webcam.
MacWebPeek
Trial versionTake screenshots on your Mac remotely via any Web browser.
Mac
Sky Mac
FreeMake business calls and chat with your partners easily.
MacTextNow - Free Text
FreeMacYahoo Messenger
FreeDiscontinued but popular messaging service by Yahoo
Mac