Miranda NG is a free, open source multi-protocol instant messaging client for the Microsoft Windows operating system. It is designed to be very light-weight and customizable, while still offering a rich feature set out of the box. Miranda NG is a continuation and revival of the original Miranda IM project.
Some of the key features of Miranda NG include:
Miranda NG is distributed under the GNU General Public License, making it free open source software. It runs on all modern versions of Windows. The modular plug-in system allows power users to customize Miranda NG to their needs. At the same time, it offers a familiar, easy to use interface for chat right out of the box.