mooSocialize is an ajax based social bookmark widget which helps submitting content to the social bookmark websites easily.

Once clicked, a window with the social bookmark website logos appears. Clicking the desired social bookmarking website does not redirect you to another website, a hovered window like Lightbox opens and the new website runs there. This nice feature helps keeping your website visitor on your page.

Ajax Social Bookmark Widget

There is also a Wordpress plugin which helps integrating mooSocialize into a Wordpress powered blog.

Name says it all but mooSocialize is built with the beautiful mootools javascript framework.