水野史土

This plugin creates and shows the snippets which display your custom field data. You can display your custom field data, by pasting these codes to your theme.
This plugin saves the time for theme developers/designers writing codes.
When you are using ACF, tab fields for ACF is displayed. The default tab is hidden. 
If you need the default tab while you are using ACF, please add this code below into your theme’s functions.php
// start from here 
add_action( ‘init’, ‘register_default_tab’); 
function register_default_tab() { 
 register_cfs_tabs(‘Defaulttab’); 
 } 
// end
Extension plugin is available from <a href="http://wp.php-web.net/?p=275" rel="nofollow ugc">http://wp.php-web.net/?p=275</a> 
This plugin supports Advanced Custom Fields Repeater addon and Advanced Custom Fields Flexible addon.
It may take times to support ACF5, since ACF5 changes dramatically. If you want quick update to support ACF5, you can pay for me http://pledgie.com/campaigns/8706

Custom Field Snippet

Creates Snippets like "echo get_post_meta($post->ID,'FIELD NAME',true);

Osamu Takahashi

Insert GTM Snippet – Simple plugin to insert Google Tag Manager snippets

This plugin inserts GTM snippets into the site.

Custom Field Snippet vs Insert GTM Snippet – Simple plugin to insert Google Tag Manager snippets