A niche interest of mine is the history of computer security mitigations: I find the killing of entire exploitation techniques fascinating.
This is why I spent some time gathering all the grsecurity and PaX patches that I could find (including some pretty recent ones), and uploaded them on archive.org, here for grsecurity and here for PaX.
I didn't upload the cryptographic signatures because I don't want people to run those patches in production: they're only meant to be studied.
They're mirrored on github and on my local mirror..