Qwt License Version 1.0,
January 1, 2003

The Qwt library and included programs are provided under the terms of the GNU LESSER GENERAL PUBLIC LICENSE (LGPL) with the following exceptions:

However, programs must still identify their use of Qwt. The following example statement can be included in user documentation to satisfy this requirement: [program/widget] is based in part on the work of the Qwt project (http://qwt.sf.net)."