Skype for Business
Windows
One of the best communication apps for businesses
Category: Chat & Instant Messaging
Skype for Business
VoipBuster
Windows
Free calls from your PC to anywhere in the world
Pidgin
Windows
Multi-protocol instant messaging for everyone
Digsby
Windows
Merge IM, email and social network accounts under one interface
eBuddy APK
Android
Chat with friends via instant messaging
Voxer Walkie Talkie Messenger
iPhone
Turn your iPhone into a walkie-talkie
Messenger for Desktop
Windows
Free desktop messenger app
Adium
Mac
Alternative instant messaging
Trillian
Windows
Multi-platform IM client
Go!Chat for Facebook
Android
A Free app for Android
Psi
Windows
Instant messaging as free and open as it should be
Nimbuzz
Windows
Old-fashioned and out-dated instant messaging platform
