Libcaca

libcaca coverts images to coloured ascii art that you can view within your terminal window.
You can also integrate it with mutt so that you can get image previews within your mutt emails.
Consider my day made.

You may also be interested in viu.

Install

sudo pacamn -S libcaca mplayer

Usage

# images
img2txt archLogo.png  

# movies
CACA_DRIVER=ncurses mplayer -vo caca -quiet movie.avi