How to get all custom fields on post page

Hi all. Which plugin or hack can help me to get all custom fields which i adding on post. For example, to use custom field, i must echo this field name on my php template file ( <?php echo get_post_meta($post->ID, 'link', true) ?> ). But i don’t want to add this code every single time. I want some code to get all custom fields while adding on post. Hope to get help. Thanks!