Courses block
From MoodleDocs
The Courses block lists and allows navigation between all of the courses in which the logged in user is a participant (as tutor and/or student). This block allows one-click access to a course's home page.
There is a also the option to list All courses... available within the Moodle site. In 1.6 this will display a list of course types (see image below) and a click on one of the types will reveal all the courses in that catagory.
Note, if the user has not yet been assigned as a particpant on a course they will see the list of all courses types. When a student enters an unassigned course using this method, they will be asked to enroll.
See also Create your own course
