fonglh

Easily create an announcements news ticker on your website. Put up new announcements just like how you would put up a blog post. Use the [announcements] shortcode to display all your announcements in a page or post.
Customize the look of your ticker from the WordPress administration screens. An options page allows you to change the colours and size.

Announcements Ticker

Provides a shortcode and custom post type to display announcements using a jQuery news ticker.

Skysa

Alert your website visitors when you have an announcement for them. The Announcements app allows you to add announcement notices which can display automatically for people who have not yet viewed that announcement. Set how long you want each announcement you add to display and have multiple announcements active at a time.
http://www.youtube.com/watch?v=Zj1uGXX2xrk&hd=1 
<a href="https://wordpress.org/extend/plugins/tags/skysa-apps" rel="ugc">More Skysa App plugins</a> -|||- <a href="https://wordpress.org/extend/plugins/skysa-official/" rel="ugc">Skysa App Bar Integration plugin</a>

Skysa Announcements App

Post pop-up ajax announcements for your site visitors. Rich content, announcement experation date and many other announcement options.

Announcements Ticker vs Skysa Announcements App