This is a script which uses jquery to display xml photo gallery.
This script uploads a large image and makes its square thumb image using PHP.
This is a script which uses jquery to display a photo gallery.
Crop an uploaded image using four coordinates obtained from mouse drag.
WordPress: Enable Featured Image In A Theme
Most themes already come with this support but if you are building one from scratch and you want to add this ability, just add this add_theme_support code to the functions.php file.