Interesting versus boring isn't really the criterion, though. I mean, doubtless there are some programmers who read code for entertainment, but they're in a min

Interesting versus boring isn't really the criterion, though. I mean, doubtless there are some programmers who read code for entertainment, but they're in a minority. Usually what we care about is what the code does. Right now I'm using the excellent Dragon NaturallySpeaking, which is useful enough to me that I bit the bullet and paid for a license. But it would be even more useful if it were open source, not because I want to read the code for intellectual stimulation, but because there are several bugs that would be easy to fix, would make it even considerably better, that the developers refuse to fix (a common enough occurrence) and nobody else can fix (a problem peculiar to proprietary software).