Cleaner Gallery was written to take care of the invalid HTML that WordPress produces when using the [gallery] shortcode.
It does a bit more than that though. It will integrate with many Lightbox-type scripts and allow you to do much cooler things with your galleries. Plus, it has a couple of extra options that you can play around with.
Gallery plugin features
- Uses HTML5
<fig>and<figcaption>. - Validates the invalid code that WordPress spits out.
- Several options on how you want your gallery images.
- Allows multiple galleries in a single post.
- Ability to set the number of images shown in each gallery.
- Ability to exclude or include any images from your gallery.
- Doesn’t load any CSS or JavaScript unless you choose to do so.