Simple Local Network Chat Program
I'm looking for a chat application to use in a small company LAN, we are looking for a software that offers secure (encrypted) text communication (voice and video are not a must, but is welcome as well) able to run in different platforms (mainly windows and mac) and free (or Open source)
I have been looking on the internet and I found some nice apps, but all of them fall in some features. For example this one http://messenger.softros.com/ looks very nice, but is only for windows.
This one looks nice too http://lan-chat.srimax.com/ but is not free.
Do you know any suitable application that fits my needs?