Note : Atlassian are the makers of Confluence wiki software - the pro version offers video chat and there is support for Windows, Mac, Linux and iOS and Android devices and the Hipchat integrations include Confluence wiki 
Hipchat : https://www.hipchat.com/ 


"It’s been almost three years since Atlassian acquired HipChat and the product is now at the center of the company’s strategy as it doubles down on team collaboration. Today, it’s launching a new version of HipChat for enterprise users who want (or need) to run the service on their private networks.
Enterprises can now install a virtual machine that runs HipChat. This version will include all the standard features that are now part of the tool, including the recently launched video chat functionality. Users who switch from the Atlassian-hosted version to HipChat Server won’t notice any major differences, with the exception that the server edition can be integrated with a company’s existing enterprise identity management services."...During its beta period, HipChat Server was already up and running at about 4,000 companies. As Bernardo de Albergaria, Atlassian’s VP and general manager of the company’s newly formed Collaboration business unit, told me last week, the company decided to put more and more resources into HipChat over the last few years and now sees the product as one of its main priorities. Atlassian plans to triple the team dedicated to HipChat over the course of the next year."
Read rest of article http://techcrunch.com/2015/01/27/atlassian-launches-hipchat-server-doubles-down-on-team-collaboration/