You can check out video about this plugin, and all the transition and animation effects demos below. More demos are available in the plugin package.
Smart Animated Popup is a jQuery powered plugin for creating normal or modal popups with custom positioning, popup open/close animation effect, customized overlay and popup looks, tons of settings. And it's responsive.
Plugin has over 20 animation effects you can assign, with additional 'random' effect that will pick random effect on every page load.