Command line image sprite generator in PHP.
# check it out
git clone --recursive git://github.com/timwhitlock/php-sprite.git
cd php-sprite
# copy in some images to test
mkdir images
cp -pvr ~/some/pics/* images
# run it
php -d "open_basedir=`pwd`" -f sprite.php -- -d images > images/sprite.css
# sprite is saved in images/sprite.png, css is piped to images/sprite.css
ls -l images/sprite*
# look at the other options
php -d "open_basedir=`pwd`" -f sprite.php -- --help