I’m Open Sourcing another Redmine plugin, the System Notification plugin. This is a simple plugin that will let Administrators send emails to a list of users to let them know of important events (e.g. downtime, upgrades). You can check out the details about it on the plugin page on Redmine.org.
If you are currently working on a Redmine plugin and need help or have an idea for a plugin you would like developed, please contact me. My company, Little Stream Software, specializes in the development of custom Redmine features and Redmine plugins.