Star Wraith makes enough money for the author to keep making sequels - but consider 3D Mahjongg, sold on this site along with the SW series.
There's quite a few Asian developers who do well with publishing too, they're always featured in newsletters (always on the cover too) - so take a look back, they look great.
The driving licence theory project made/makes TGC a lot of money, and the new title of that ilk (Teaching You Touch Typing) should be out soon.
Digital Awakening (Dead Glory to his mates) made a commercial game some time ago, back in the black days of real DBPro bugs, not like these piddly little niggles we complain about these days

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There's also paid advertising, maybe get companies to sponsor your game - with a decent following an online company might be happy to throw some money your way, they can brag about this game that features them, get the advertising - and really a small amount to them is a damn considerable amount to us. There's nothing surprising about a company spending thousands on an advert - if you can get 100,000 people to sit and have to look at a company's logo (or whatever), then that's a valuable selling point. People tend not to mind advertising as long as it's purely visual, like Trackmania Nations, completely free, a really good game, and full of add's for pepsi and suchlike.
Basically if you can make something that people want to buy then you'll sell it to them - more and more independant developers are making money, if you can get behind a good product and market it accordingly you could make some decent cash. I'm not talking enough to afford you quiting your day job, but certainly enough to keep your hardware and software upto scratch, people are more likely to give you money if they know it's contributing to something beneficial.

''Stick that in your text and scroll it!.''