One real world success story for Qt: Andy Brice (Oryx Digital, UK) has been developing his successful desktop software product, Perfect Table Plan (a seating p

One real world success story for Qt: Andy Brice (Oryx Digital, UK) has been developing his successful desktop software product, Perfect Table Plan (a seating planner software for events), in C++ and Qt, and selling it for over 10 years. (His newer product HyperPlan may be done in that stack too.) I've been a reader of his blog from some time: successfulsoftware.net. Many good tech and more biz tips there (for the software product biz - for desktop apps). And his app is cross-platform between at least two of the big 3 consumer OS's, IIRC (or maybe all 3) - Windows, Linux and MacOS. Edit: I had also checked out Qt (v3 or 4) and tried some of the example apps (reading, compiling and running them) and also bought and read most of a book on Qt programming by some well-known Qt developers (don't remember the book or author names right now, but they may have included some of the original Qt creators). The impression I came away with was similar to that of some of the other commenters here - Qt seemed to be a well-designed library, not too difficult to learn, and with fairly good documentation at the time. I could understand the signals and slots mechanism it uses, without much trouble. Didn't get the moc part though (was not a C++ expert, also did not look much into moc) but it may not be needed to know that well, may be enough just to be able to use it.