Ajax Based Social Bookmark Widget: mooSocialize
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.
There is also a WordPress plugin which helps integrating mooSocialize into a WordPress powered blog.