A collection of artwork for schoolkids and others that is free of copyright concerns as well as safe from inappropriate images.
A large collaborative community that creates, shares and remixes clipart. All clipart is released to the public domain and may be used in any project for free with no restrictions.
A database of 7,875,105 freely usable media files (pictures, graphics, videos) to which anyone can contribute. Making available public domain and freely-licensed educational media content to everyone.
DomainKeys Identified Mail (DKIM) lets an organization take responsibility for a message that is in transit. The organization is a handler of the message, either as its originator or as an intermediary.