Blackthorn's (these needles are the pointiest needles I've ever worked with). The pattern is New Fallen Snow (from the Visions of Sugarplums collection) which I've adjusted to fit Mickael's foot.
Caleb actually picked out the pattern from Ravelry. I was doing a search of sock patterns that didn't have lace (I can't remember all the other filters I used, just not lace) and Caleb was helping me find one that would suit Mickael. I had already decided I didn't want to knit a plain, grey sock, but any pattern or texture had to be subtle. As we were going through the socks, Caleb saw my New Fallen Snow sock and immediately said that was the one - he didn't even know it was my design! I'm calling these Tabby in the Snow socks while I'm working on them, but I'm sure Mickael would rather they be called Warlord of Doom socks. Or something.
It just occurred to me that I may or may not have ever explained how to adjust a sock pattern for a different size foot. Have I ever done that here? Would you be interested in that as a blog post? Let me know in the comments and if enough people are interested, I'll work it up.