AV Sites

Animation:
Learn Animation
Claymation
Principles of Animation

Sound:
Programs:
Audacity Freeware
Wiretap Studio
Wiretap Pro Free Download
Sound Files:
A1 Free Sound Effects
Find Sounds
Sound Dogs
Sound FX Page
All About Sound Effects
Free Sound Effects PC

Free Images:
flickr
morgueFile
getty images
google images
Freeimages
amgmedia