興味ありそうな Advent Calendar まとめ
Boost Advent Calendar 2011
http://partake.in/events/597a0fc3-0e3a-47a3-8fc3-4f32ad846a3d
Competitive Programming Advent Calendar
http://partake.in/events/ee35b200-e151-44c1-b123-482d0a7447b5
C++11 Advent Calendar 2011
http://atnd.org/events/21936
Emacs Advent Calendar jp: 2011
http://atnd.org/events/21982
Haskell Advent Calendar 2011
http://partake.in/events/eaea52c2-61ef-46d5-a855-3a2dde459e3a
JavaScript Advent Calendar 2011 (フレームワークコース)
http://atnd.org/events/21977
PyPy Advent Calendar 2011
http://atnd.org/events/22078
2011 Pythonアドベントカレンダー(Python3)
https://connpass.com/event/142/