Linux kernel is another such project, I think. One of the reasons why it's done this way (through mailing lists and not e.g. through pull requests on github) i

Linux kernel is another such project, I think. One of the reasons why it's done this way (through mailing lists and not e.g. through pull requests on github) is that all the history is tracked in a way that's fully under control of the community. So it's fairly easy to find who/when submitted the patch, how it looked like, etc. Of course, another reason is history - most of the process was established long before git, when CVS was the VCS.