Consumer Digital Video Library
"Access to high quality uncompressed video scenes that may be used freely for research and development purposes. Users may also contribute their videos to the CDVL database."
Public photography archives.
"Provides free loops and audio clip downloads to the music production community." Formats in Wav, MP3, Aif, & Midi Sound Files. Music Software & Free VST Plugins.
Getty is a "leading distributor of still imagery, footage, music and other premium content." They have recently made over 35 million photos free to use online, provided an embed code is used.
You can limit your search to usage rights. Select: "Only images labeled for reuse."
"Access to print, pictorial and audio-visual collections and other digital services."
"Free images for your inspiration, reference and use in your creative work, be it commercial or not!"
Public domain images.
Available from gettyimages. Download photos, images, illustrations and vectors.
"Royaltyfreemusic.com offers a variety of FREE high-quality royalty-free items, including royalty-free stock footage, royalty-free sound effects, royalty-free clip art, royalty-free images, royalty-free photos, and of course, royalty-free stock music."
"SoundBible.com offers free sound clips for download in either wav or mp3 format. We offer free and royalty free sound effects and clips for video editors, movie scores, game designers, and weekend sound warriors. "
Thirty websites from which you can download free stock photos.
"A database of 16,524,428 freely usable media files."
"There are 40,589 unique images, most in multiple formats, yielding a total of 147,432 images to download."