DjVu

Overview
DjVu is a multi-layer raster file format for digital documents that was originally developed at AT&T Labs and is commonly used in book digitization, for example by the Internet Archive.

Resources

 * Website
 * Overview
 * Viewers & Plug-ins
 * Reference (requires DjVu plug-in)
 * Specification (requires DjVu plug-in)
 * DjVuLibre reference implementation