This plugin will display your announcement with countdown timer.
Check official website for live demo http://www.gopiplus.com/work/2010/07/18/deal-or-announcement-with-countdown-timer/
Deal or announcement with countdown WordPress plugin will display the announcement, deal, offers with countdown timer. admin can add N number of deal at dashboard, only one active deal will display at website front end with countdown timer. this plugin is best suitable to show promotional offers to the user with countdown time.