Looking for a plugin

I am looking for a plugin and not sure exactly what it would be called (if it exist) which is making it hard to locate. Basically what I need it something like a streaming stock ticker. The ticker would be located on the top of the home page and the content would just be the titles (link) to the top 10 most recent post of a certain category. Is this something that you guys have or maybe even something you have heard of?