Enrolling in a course triggers a CourseDidEnroll notification. The course's ID is transmitted as subject of the notification.

Creating a new studygroup triggers a StudygroupDidCreate notification. The ID of the studygroup is transmitted as subject of the notification.

Creating a news triggers a NewsDidCreate notification. The news's ID is transmitted as subject of the notification.

Adding a buddy triggers a BuddyDidAdd notification. The contact_id of the new buddy is transmitted as subject of the notification.

Enabling or disabling a plugin triggers a PluginDidEnable or respectively PluginDidDisable notification. The plugin's ID is transmitted as subject of the notification.

Logging in triggers a UserDidLogin notification. The user's ID is transmitted as subject of the notification.