Skype is currently the world's most popular free HD instant messaging software (and VoIP) for all kinds of desktop and mobile platforms. Low system resource requirement, high-quality voice communication and high stability have won its hundreds of millions of users around the world. After acquired by Microsoft in 2011, it became an independent department of Microsoft. And in 2013, if finally replaced Microsoft's own instant messaging tool MSN. In 2014, it released an embedded web version.
Now in people's everyday life and work, we can't do without the network, and for network applications, instant messaging software play an important role. If your local area network (LAN) cannot be connected to the public network or not convenient to use ICQ, MSN such kind of IM applications that are already well known to everybody, then please use BORGChat, which can completely replace them perfectly.
IP Messenger is a widespread cross-platform LAN instant communication software; based on TCP/IP (UDP) protocol; no need the server system.
Miranda IM (short for Miranda Instant Message), an instant messenger designed only for Windows system, which is open source, supporting multiple protocol and customizable for many plugins, with very little system resources occupation.