OutlookMessenger - Broadcast Tool
Its a excelent instant messaging and perfect Group Chat.
Outlook LAN Messenger has been the leading provider of Cross Platform (Windows, MAC, Linux) instant messaging and collaboration for business since 2004.
Offers a Real-Time Collaboration that improves efficiency and productivity by enabling users to connect and collaborate with others within single or multiple offices from anywhere in the world.
Packed with seamless features and easy customization with enormous flexibility to meet each business's specific needs.