Posted by Rallaz on Feb 12, 2013; 8:15am
URL: https://forum.librecad.org/download-master-branch-precompiled-binaries-tp5707583p5707585.html

trial/pay Qt SDK is only to develop (with Digia support) commercial progams.

For develop open source (and commercial) Qt are LGPL licensed:
http://qt-project.org/downloads

For a more actual (2013-04-16) windows precompiled version (only uncompress and use):
http://sourceforge.net/projects/rallaz.u/files/librecad-win/librecad2.0.0beta1-git2013-04-16.7z/download