飞鸽传书(IPMsg)是一款跨平台的局域网即时通信软件；基于 TCP/IP(UDP) 协议； 无需服务器；支持文件及文件夹的传输，速度极快； 十分小巧、操作简单、且完全免费。-IP Messenger (IPMsg) is a cross-platform LAN instant messaging software based on TCP/IP (UDP) protocol without server supports file and folder transfer, fast