Is there any software for creating iQuiz?

Yes, Aspyr Media has a free software iQuizMaker. However, iQuizMaker is only for MAC OS. PC version will be available in May, according to Aspyr Media.

bounci.rabbit.123 at http://www.ipodwizard.net/showthread.php?p=253074 has written a VB software for PC. Both .exe file and source code are available for download.

Alternatively, you can follow the instruction on Apple's official iQuiz website to create your own using a text editor.