pixolay is for pixel perfect overlay images used in Web Development.
Its very simple to use and comes as a javascript. To use it in your projects include src/pixolay.js
Then add the code
$(function(){
pixolay.init( 'images/home.png' );
});
Simple as that. Pixolay currently uses localStorage as its storage mechanism. You can turn the overlay on and off at any time and Pixolay will remember it.
It requires jQuery but this dependency will be removed in future versions.