WP Emo-ello Wordpress Plugin Fontello Emoticons can be inserted using either HTML, shortcode or a built-in TinyMCE plugin. This plugin also replaces Wordpress' smileys.
WP Editor Comments Plus Wordpress Plugin Enhance your site's comments with the built in WordPress TinyMCE editor, inline comment editing and asynchronous comment posting.
WP Super Edit Wordpress Plugin Get control of the WordPress wysiwyg visual editor and add some functionality with more buttons and custom TinyMCE plugins.
wordpress-snapapp Wordpress Plugin WordPress SnapApp plugins lets you add SnapApp Wigdet Code to content on your post and pages. It offers a tinyMCE shortcode GUI which will guide you through the entire process of a SnapApp.