There are a number of softphones and instant messaging applications available on the internet, many of which are available without any cost to you. But Collanos Phone is an application which combines both the functions which means you can not only make VoIP calls but also send instant messages.
What Is Collanos Phone?
Image via Wikipedia
Collanos Phone is a two-in-one VoIP application: a VoIP (Voice over Internet Protocol) phone and a instant messenger with multi-protocols.
With Collanos Phone, you can make audio and video calls and also send instant messages which includes such networks as Jabber, MSN, ICQ, AOL, and Yahoo! networks.
It can work on various platforms with versions for Windows, Mac OSX, and Linux.
In this way you can use this software on whatever operating system you are using.
Image via Wikipedia
What you can do with Collanos Phone:
You can instal it on whatever operating system you are using:Versions available for Windows, Mac, OSX, Linux.
Collanos Phone is based on many pre-existing open-source components and governed under the General Public License (GPL)
With all such functions and features, all basic features of Collanos Phone are available free.
Read more about Callanos Phone on its forum.
You can also get a short user guide at http://www.collanos.com/help/phone/user_guide