MaxChat

Send and receive instant messages through your LAN or VPN (Virtual Private Network). Some features increase productivity of your employees avoiding outside chats from other internet instant message systems; Add contacts easily and group them by department, company, and status; Send message to a group at once; Send and receive files and screen shots; Many skin colors; Keep a history of your messages.

Version 2006 2.1 is a bug fixing release.

Requirements:

Windows 98/Me/NT/2000/XP

Limitations:

50-day trial