It is! As of September 4, 2000, version 2.2 of the & Qt; libraries were licensed under the GPL, thereby fulfiling all aspects of free software. Since version 4.5.0 Qt is also available under the LGPL.
Claro que o é! O día 4 de setembro de 200, a versión 2. 2 das bibliotecas & Qt; foron licenciadas sob a GPL, satisfacendo deste xeito todos os requerimentos do software libre.