I expected the same and was gladly surprised with this interesting collection. That being said, there's a link under "uncategorized" regarding the X window system :)
Likewise. I just listened to a BSD Now podcast on building the FreeBSD graphics stack.[1] They went into X and its history a bit so I had X on the brain.
But this list from OP is even more interesting! That list is a wonderful (mine?)field of rabbit holes! Bookmarked and thank you.
I was doing this and gave up shortly after realizing the network protocol supports endian negotiation and also some messages are still arbitrary endian
Was also expecting this but was very pleasantly surprised at what was there. It's a pretty awesome list of intermediate to advanced programming projects covering a nice variety of things.