Evas is a canvas library, designed to work with the X Window System. It is designed to be able to take advantage of any graphics hardware or CPU processing power you may have, or to adjust for the lack of it. It has a simplistic API to access the features of a canvas to aid in making development using Evas easy.
The Free Animation and Modeling Project (or FAMP), is a project to create a full-featured 3-Dimensional Modeling and Animation System. FAMP shall include support for animation, animated modeling. FAMP already includes the ability to extend easily without modifying code thanks to a plug-in architecture.
feh is a fast, lightweight image viewer that uses imlib2. It is command line-driven and supports multiple images through slideshows, thumbnail browsing or multiple windows, and montages or index prints using TrueType fonts to display file information. Advanced features include fast dynamic zooming, progressive loading, loading via HTTP (with reload support for watching webcams), recursive file opening (slideshow of a directory hierarchy), and mouse wheel and keyboard control.
findimagedupes is a command-line utility which performs a rough "visual diff" on two images or a whole tree to detect if any look similar. It can produce output suitable for driving GUI front-ends. It can also export a GQView compatible collection file, so you can deal with the duplicates visually. On common image types, findimagedupes seems to be around 98% accurate.