Internet Archive - Tons of public domain/creative commons media archives.
Free Music Archive - A good place to find music you can use in video projects.
Creative Commons - Learn more about Creative Commons licenses and share your media with the world!
Free Sound - User generated creative commons sound effects.
Image Copyright - American Society of Media Photographers Copyright guidelines.
VLC - Open Source media player. Play almost any type of video file on your PC.
Audacity - Open Source audio editor.
DVD Flick - Burn almost any video file to a regular DVD for a DVD player.
HandBrake - Open Source DVD ripper and transcoder.
DVD Shrink - Open Source DVD ripper.