(Like a ɡood book, not a cool cartoon.)
Computational Origami (youtube)
IMSLP - classical sheet music in the public domain (i.e. free)
Archive.org and the Wayback Machine
Amoeba Records - What's In My Bag (youtube)
my all-time favorite Lindy Hop routine
Orisinal - Ferry Halim - Bugs (simple, sweet online game)
Indigo Girls bootlegs and other stuff
The Timeless Way of Building, an important book about the effect of the built environment on the well-being of the individual and the community.
Erowid: Documenting Psychoactive Substances
Radio Garden listen to radio live all over the world
Shazam - it will tell you what song is playing around you (also available as browser extension - SO GREAT!
Windy.com - really cool global interactive weather map
another cool satellite weather map - Earth Nullschool
Astonomy Picture of the Day from NASA
Create a mask armature to custom-fit your face using wire mesh