I would like to integrate an image gallery in to my website. It is a website for a Mixed Martial Arts event called Tuff-N-Uff. I have tried several but the mail problem is that they are too complex. I need something simple. A simple gallery with seperate albums and thumbnails. That is pretty much it. A lightbox would be cool but is not at all necessary. The main thing is that it looks good and is easy for the viewer to navigate.

Can anyone suggest any?

My dad, who is a photographer, use Banana Album on his website. It's easy to use, and looks very professional. You can also donate to remove their "license/loadingbar" if you want that.
http://www.bananalbum.com/