Mibew Messenger is distributed under the terms of the Eclipse Public License (or the General Public License, this means that you can choose one of two, and use it accordingly) with the following special exception.

No one may remove, alter or hide any copyright notices or links to the community site ("http://mibew.org") contained within the Program. Any derivative work must include this license exception.

Eclipse Public License:
Local version or http://www.eclipse.org/legal/epl-v10.html

General Public License:
Local version or http://www.gnu.org/copyleft/gpl.html