Public domain images that may be useful for classroom projects.
The World Digital Library (WDL) makes available on the Internet, free of charge and in multilingual format, significant primary materials from countries and cultures around the world.
Photo sharing site allowing free image uploads.
Smugmug is a photo sharing site. Features to assure security.
Ookaboo has collected nearly a million images of precisely defined topics such as places, people, species and products. All images in Ookaboo are public domain or creative commons and can be used freely for creative projects of all kinds.