qt creator is now open source

here is how you can compile it from git

$ git clone git://labs.trolltech.com/qt-creator

I use qt snapshot for arora installed in /usr/local/

$ export PATH="/usr/local/Trolltech/Qt-4.5.0/bin:$PATH"

$ cd qt-creator/

$ /usr/local/Trolltech/Qt-4.5.0/bin/qmake

$ make
$./bin/qtcreator

and open an project , in my case arora , Happy debugging