The Princeton Program in Plasma Physics - In my spare time, I manage the Program's website.
flickr - Photography is one of my hobbies, and I sometimes post pictures here.
goodreads - Reading is another of my hobbies, and I update my reading progress here.
The Cornell Daily Sun - The nation's oldest independent college daily.
Jeffrey Parker's Homepage - The official homepage of Jeffrey Parker himself.
KeePass Password Safe - The free, open source, light-weight and easy-to-use password manager.
feedly - RSS reader with cloud support
http://clement.beffa.org/labs/projects/middleclick/ - Three-finger tap to middle click on OS X.
http://justgetflux.com/ - For people who work at night.