Edit Any Table is a plugin for WordPress by redeyedmonster that allows you to connect to any MySQL database of your choice (as long as your hosting allows) and search, edit, add and delete records in an easy to use interface. Ideal if you have built a site referencing another database and you want to allow other editors/administators of the site to alter, update, delete, add and correct entries.
Download: http://wordpress.org/extend/plugins/edit-any-table/