It has been said that the days of the independent developer are over, as modern applications require more professionalism in user interfaces, graphics, and so on.
Nevertheless, I imagine that there are a number of people on StackOverflow who are their own boss, who produce their own software, and who might even be making significant hobby income or an actual salary-level profit.
Are you an independent developer making a living (or a significant chunk of change) on your own product? If so, what's your product? Or, do you feel that the days of the independent developer are indeed over?