Plugin: System Notification plugin
I've just released another plugin, the System Notification plugin. It's 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 and the release announcement on my blog. I welcome any contributors, the list of proposed features is in my Redmine and anyone can fork my code on GitHub.