[quote author="1+1=2" date="1337357585"]
[quote author="harward" date="1337355239"]my project is commerical ,Is Qt Creator free[/quote]
Sorry for my poor English, I can't catch up with you. Does a project is commercial or not have anything to do with a IDE such as Qt Creator, Visual Studio, Ellipse, etc. ?[/quote]
Depends on the individual IDE and the license it is released under.
Visual Studio, for example, has a free "Express" edition that is allowed to be used for commercial products, although you can't install any add-in's with that edition and it is lacking some of the "enterprise" features. On the other hand there are IDE's that do not allow commercial usage, most notably the "Starter" edition of Embarcadero's Delphi. Qt Creator is released under the GNU Lesser General Public License v2.1, which means you can use it for free and for any purpose (including commercial purposes). Though it should be mentioned that if you want to use the Qt Framework (and thus the Qt Libraries) in a commercial application, you may need to acquire a commercial Qt license - depending on how you want to link the libraries to your application...
My OpenSource software at: http://muldersoft.com/
Qt v4.8.6 MSVC 2013, static/shared: http://goo.gl/BXqhrS
Go visit the coop: http://youtu.be/Jay...