Current

• Bluetrait Event Viewer (1.8.1): This plugin monitors events that occur in your wordpress install Plugin Page »
  

Past

• http_x_cluster_client_ip (0.1): This plugin modifies the users ip address so that it has the correct value if running behind a cluster (i.e. http://wordpress.org/support/topic/93825?replies=3).
• delete_comments (0.1): This plugin deletes all spam and un-approved comments in wordpress. Needed if you've been spammed badly (i.e. http://wordpress.org/support/topic/98046?replies=11)
• deactivate_plugins (0.1): This plugin deactivates all plugins. (tested on Wordpress 2.0.5 and 2.1.2) :)
• Dashboard Lite (0.1): This plugin removes all RSS feeds off the dashboard. Requires WordPress 2.2+