Related tags

Instalação

1. Upload to the /wp-content/plugins/ directory
2. Activate the plugin through the ‘Plugins’ menu in WordPress
3. Place in your tag template
   (usually it’s archive.php)

• If you need cloud-style links to related tags:

• If you need plain text list of related tags:

• If you need link list of related tags:

Also you can use widget in your sidebar (but keep in mind it shows on only on the tag page).

you can customize view with $args – is the same with wp_tag_cloud
and here is defaults:

<?php $args = array(
    'smallest'                  => 8,
    'largest'                   => 22,
    'unit'                      => 'pt',
    'number'                    => 45,
    'format'                    => 'flat',
    'separator'                 => "\n",
    'orderby'                   => 'name',
    'order'                     => 'ASC',
    'exclude'                   => null,
    'include'                   => null,
    'topic_count_text_callback' => default_topic_count_text,
    'link'                      => 'view',
    'taxonomy'                  => 'post_tag',
    'echo'                      => true,
    'child_of'                  => null, // see Note!
); ?>