private messaging software needed (for multiple computers to communicate within an office)

Hi I have 3 computers at my office and would like to be able to install a program or app which can easily send pop up messages, and so all users can communicate with each other. Does anyone know any software for this other then something like yahoo messenger ? I would like the software to communicate within the network if possible.
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andgreenConnect With a Mentor Commented:
If you have devices based on different OS, take a look at Softros
This LAN messenger supports all Windows, Android 4.0 and higher and Mac OS.
All data is encrypted, internet or server is not required. Customer support is responsive and replies on requests.
Austin TexasSystems EngineerCommented:
What you are looking for is a LAN messenger and there are several on SourceForge.

Have you tried this one?
Austin TexasSystems EngineerCommented:
If you need it to be encrypted as well, you can try this one:
Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Steven WallaceManaged Services ManagerCommented:
Skype is good option.

Microsoft also makes Skype for Business (used to be called Lync), it's included in most Office 365 business plans.
Austin TexasSystems EngineerCommented:
Steven brings up a good point that Skype is not just a VIOP solution but is also a solid messaging platform. However, Skype is not a LAN messaging platform in that it requires communication with servers on the Internet. Also, there is some question about if Skype's encryption implementation is still as secure as it was prior to its acquisition by MS.
Phil PhillipsDirector of DevOps & Quality AssuranceCommented:
Mattermost could work for you.

There's also Slack and HipChat. Slack is a service, but encrypted. HipChat is also a service, but is also available as a self hosted solution (it's only $10 a year since you have less than 10 users).
Bill StoneCommented:
I would suggest anything from free applications similar from mentioned above.
Austin TexasSystems EngineerCommented:

Were we able to help you find what you were looking for? Let us know what you finally decided on!

Thanks, Tex
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