EXPath - Collaboratively Defining Open Standards for Portable XPath Extensions
ServletX ( www.expath.org ), a small web container for executing xslt, xproc, xquery, and such
window.postMessage is a method for safely enabling cross-origin communication. Normally, scripts on different pages are only allowed to access each other if and only if the pages which executed them are at locations with the same protocol (usually both http), port number (80 being the default for http), and host (modulo document.domain being set by both pages to the same value). window.postMessage provides a controlled mechanism to circumvent this restriction in a way which is secure when properly used.
Cross-Origin Resource Sharing (CORS) is a specification that enables a truly open access across domain-boundaries. With this site we want to support the adoption of CORS
Using image sprites is sort of a last resort after you have done as much as you can with other optimization techniques. A sprite is an image that has all of your other images inside of it, so if your sprite has 10 images, you'd be getting rid of 9 HTTP requests and speeding your site's loading time up by the time for each of those 9 requests' latency.