Boostra Annoucement Bar

Very good app for building announcement bars that are actually useful, not just decorative.

What I liked most is the flexibility: promo bars, discount code bars, countdown timers, and free shipping goal bars all in one place. Customization is strong, the interface is clear, and the setup is simple.

The page/device targeting and built-in analytics are also a big plus. For a free app, this is a very solid tool.