I would argue that if you find any successful open source project on Gitlab, Github, or the code forge of your choice, you've likely found some form of "good code".
Any code that is used and minimally hated by a large number of people is good code in my opinion. It's valued by its users, and ultimately that is what matters.
It may not be perfectly DRY, use popular abstractions, or whatever people today think of as ideal code, but successful software projects solve real problems every day. The authors have likely done a good job of balancing usability with code quality. And I think that's the best we should hope for.
Any code that is used and minimally hated by a large number of people is good code in my opinion. It's valued by its users, and ultimately that is what matters.
It may not be perfectly DRY, use popular abstractions, or whatever people today think of as ideal code, but successful software projects solve real problems every day. The authors have likely done a good job of balancing usability with code quality. And I think that's the best we should hope for.