WCK Custom Taxonomy Creator allows you to easily create and edit custom taxonomies for WordPress without any programming knowledge. It provides an UI for most of the arguments of register_taxonomy() function.
If you want to have a custom list in your theme, then you can pass the taxonomy name into the the_terms() function in the Loop, like so:
the_terms( $post->ID, 'people', 'People: ', ', ', ' ' );
That displays the list of People attached to each post.
Creating a taxonomy generally automatically creates a special query variable using WP_Query class, which we can use to retrieve posts based on. For example, to pull a list of posts that have “Bob” as a “person” taxomony in them, we will use:
$query = new WP_Query( array( 'person' => 'bob' ) );