Top rated in Instant Messaging & VoIP
Slick and unobtrusive menu bar app that makes voice chats worry-free and keeps the flow of conversation clear.
VOIP (Voice-over-IP) application.
Modern, distributed IRC client based on the Qt4 framework.
Messenger application for Facebook.
Call and text to anyone in the world for free.
It lets you make and receive calls via your phone right to and from a desktop.
Snapped is an application that allows you to view and send snapchats.
Chat with others and share any type of data with them.
Use your Mac to make phone calls, send/receive text messages, record conversations...
Cloud instant messaging service for Mac computers.
Chat with friends anytime, anywhere with Tictoc app.
Manage all your phone calls from Mac
Fire Hose Chat lets you chat with visitors on your website.
It allows you share and organize work from desktop to mobile.
It helps you send and receive top-secret messages, documents, and media files.
It allows you to send and receive messages via the WhatsApp service.
Native desktop Mac client for Google Hangouts.
Tor Messenger--based on Instantbird...
Send messages to multiple social networks.
It is a messenger for business that lets you stay connected with teammates.
Web Chat Server, developed in JavaScript.
It allows you to access your Facebook account with ease.
This is an app for Facebook that allows you to send both voice & text messages.
Unofficial Instagram desktop application for your Mac.