This plugin allows you to send individual messages to all Buddypress users.
WP-Notify is a notification plugin, this will help you to notify or alert informations about latest posts/system maintenance time etc... to your visit
WP / network plugin to display admin news to other users.
Integrates your latest tweets in your weblog.
XMPP sender allows to send (and receive) notifications about new comments in blog. Also it can override email function to xmpp for your blog.
Allows to receive e-mail messages in character sets different from the blog charset.
Add your own voice to your blog sidebar by using this customized widget and your phone.
Checks via Google Search if the comment being left is a common spam comment.
This plugin adds a Flash Object to your sidebar which enables your visitors to send little messages to your Nabaztag bunny.
Displays a custom message at the top of your site to welcome users who are referred from other specific sites such as Digg, Reddit and Stumbleupon.