Diana K. Cury

Very simple pluing, no configs, no screens, just action! 
Simple Smilies add all WordPress smillies in comments form and a simple javascript let users click them to insert. 
This is a very light plugin, the javascript only loads when in singular/single contexts, also there is no stylesheets.

Simple Smilies

Let users insert WordPress smilies when commenting in you site.

Sharon

Works with Custom Smilies 2.3!
I use Custom Smilies 2.3 plugin. However, I prefer the Yahoo! Messenger emoticons. So, I did some digging, found them all, then tweaked my plugin to use those emoticons. Yahoo! Emoticons for Custom Smilies 2.3 is a tweak for the plugin Custom Smilies 2.3 found at http://goto8848.net/ . This updates files within that plugin so that you can use Yahoo! Emoticons with your WordPress installation. To save some time for anyone else who wants to do this, I’ve made this tweak available for everyone.
Important: If something breaks, please keep in mind that I’ve only added smilies to an existing plugin. If you have problems, I recommend uninstalling this plugin and downloading the original plugin to see if it works first: http://goto8848.net/projects/custom-smilies/

Yahoo! Emoticons for Custom Smilies 2.3

I use Custom Smilies 2.3 plugin. However, I prefer Yahoo! emoticons. This is a tweak to allow use of those emoticons with Custom Smilies 2.3.

Simple Smilies vs Yahoo! Emoticons for Custom Smilies 2.3