No specific info about version 5.0. Please visit the main page of Yammer on Software Informer.
A chatting tool that can be used by companies for internal comunication
Facilitates instant messaging and alerts on a local network
An instant messenger designed to communicate over LAN.
JoinNet Messenger provides features like online presence, contact listing.
TSR Messenger allows you to chat with your friends or family.
Send free text messages to mobile subscribers in the Philippines.