VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.
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Gyach
Pidgin
Jitsi
Skype
LAN Messenger
BuddyTalk Instant Messenger
IP Messenger
Trillian
Sim-IM
Pidgin
Yoono
Skype
Trillian
Miranda NG
ooVoo
Kopete
Gyach Sim-IMPidgin - Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.
Jitsi - Open-source video calling and chat platform.
Yoono - Yoono is a compact program that permits you to unite your social platforms and visit projects and adds rich media to whatever you’re a survey on the net.
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Trillian - Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.