BigAnt LAN Messenger 2.52BigAnt LAN Messenger is designed for small and medium enterprise to send instant message by using Office's Local Area Network. Secure, simple and stable!
Key features:
1.Send instant message and offline message
2.Send file, folder
3.Send group message
4.Voice and video chat
5.Desktop capture
6.Host conference
7.Send password-protected message
download here
Tham khảo thêm ở đây: http://soft444.com/2010/12/17/bigant-lan-messenger-2-52/