Instant Breaking News (IBN) is a FREE WordPress plugin which will allow you to pin posts and feature them as “Breaking News” at the header of your website.
Get the free IBNplugin from here.
Currently it's designed to work with every WordPress base theme. But if you would like to connect it with a custom template, it'll require a bit of touches.
Check the source code at GitHub.
What's the tech stack?
→ WordPress Core (PHP)
→ SCSS (CSS preprocessor)