In addition to Mac OS X, the PowerBook G4 comes loaded with iLife '04, including iTunes, iPhoto, iMovie, iDVD and GarageBand.
QuickBooks bundle
The PowerBook G4 also includes QuickBooks for Mac New User Edition and you also get a collection of graphics tools including FAXstf, Art Directors Toolkit, Microsoft Office v.X Test Drive, FileMaker Pro Trial, OmniGraffle, OmniOutliner and Graphic Converter.