1986 ( XFreeInc.)
1990-1991 ( IBM Corporation .)
1989-1991 Adobe Systems Incorporated
2004 Andrey Panin
2007-2008 Apple,Inc
2003-2006 Ben van Klinken and the CLucene Team
2001 Bigelow & Holmes Inc
1998 Bjorn Reese
Carsten Haitzler
1996 Daniel Dardailler
2004-2005 Daniel M. Duley
2009 David Faure
1996-2004 David Turner,Robert Wilhelm,and Werner Lemberg
1987-1988 Digital Equipment Corporation,Maynard,Massachusetts
1984-2006 Free Software Foundation,Inc
2017 Fronius International GmbH
2000 Hans Petter Bieker
1990-1991 IBM Corporation
2001 Instructions by URW++
International Business
John Bradley
2012 Klaralvdalens Datakonsult AB
2011 Klaralvdalens Datakonsult AB,a KDAB Group company,info@kdab.com
1999 Matt Koss
1999-2000 Mizi Research Inc
1992-2004 P.J
2015 Portion The Qt Company Ltd
2011-2012 Research In Motion
2011-2012 Research In Motion Contact
2009-2012 Research In Motion Limited
2001-2004 Roberto Raggi
1999 Serika Kurusugawa
1997-2004 Symbian Software Ltd
1985-1998 The Open Group
2015 The Qt Company
2015 The Qt Company Ltd
2015 The Qt Company Ltd. Contact http://www.qt.io/licensing
2015 The Qt Company Ltd. Contact http://www.qt.io/licensing/
1987-1993 The Regents of the University of California
1998-2000 Trolltech
2002 USC/Information Sciences Institute
2005 W3C® (MIT,ERCIM,Keio)
1985-1988 X Consortium
2003-2004 immodule for Qt Project
2007 the Initial Developer