imiwa? - For mobile
JEDict - Mac only application
SPACE ALC - Useful for idioms
wani-kani - A great kanji learning tool using a similar method to Remembering the Kanji
The World Wide Web Consortium - Please, for all our sakes, at least try to listen to these guys.
Ravelry - The de facto knitting website
Smitten Kitchen - My favorite cooking blog. Interesting recipes and beautiful photography.
Mind's Eye Society - Live-action role-playing in the World of Darkness setting
NordicLarp.org - A good resource for information about a more artistically motivated style of larp