Font Emoticons replaces WordPress’ smileys with font-based emoticons.
MU Plugins Tool allows you to selectively enable/disable any MU (must-use) plugins you have installed.
Fast Secure Contact Form lets your visitors send you a quick e-mail message and blocks all common spammer tactics. Additionally, the plugin has a multi-form feature, optional extra fields, and an option to redirect visitors to any URL after the message is sent.
Yet Another Related Posts Plugin displays a list of related entries on your site and feeds based on a unique algorithm.