Stock footage, photos and more

The Internet Archive - tons of useful footage and stills, including the Prelinger Archive. Also home of the Wayback Machine. Some of this is totally free, some is royalty free, some is under license, including very flexible Creative Commons licenses

iStock Photo - great royalty-free photos plus illustration, vector art, Flash and more at really reasonable prices, suitable for graphic design and rostrum work

iStock Pro - part of iStock dedicated to higher-end users and priced accordingly

Artbeats - royalty free film and video library

Getty - still images, moving images; includes Digital Vision and Image Bank

Corbis - RF photos and illustrations

Veer - photography, illustration, type, motion graphics

Foto Search - lets you search through 50 stock photography, photo and footage suppliers, as well as clip art and illustrations

Sound Dogs - for all your sound effects needs

Video Google - in Beta but an interesting concept shaping up