Feh

This is my favorite image viewer. It has the standard features such as thumbnail views and slideshow modes, but it also can fetch files with wget and reload periodically for webcams, etc.

dead link: http://www.linuxbrit.co.uk/feh/

Fixed link

Gozer

This is a command line tool to make an image from some text using most any font.

dead link: http://www.linuxbrit.co.uk/gozer/