Two recent articles cover the success of Trolltech and their product Qt 4, on which KDE 4 will be based. ‘Trolltech: A case study in open source business‘ looks at the continued growth of the company based on dual licenced Free Software. The article describes what KDE and Trolltech gain from each other, including user feedback to Trolltech and sponsored developers for KDE. The Australian Computerworld declares that Qt 4 raises the bar for cross-platform app dev tools. They cover the separate modules of Qt 4 and the cross-platform quality, giving it a 9.2 out of 10 approval rating.