Demo php code how to include the ItemManager library in a function, and use it's api to show a gallery on the front. This gives you an idea in how many ways you could use ItemManager.
Use a simple php function call in your cms, and voila the gallery shows on the front. In this case, get-simple was used as a cms system. But it's all straight forward php code, you can do this in any css framework and in any cms sytem.