our google drive is kind of a mix of special deal and standard in that we pay google for our university mail and some other things and google drive comes with it.  Blackboard is a course content management system.  I use it for managing a class but also to create a knowledge repository of relevant articles and other documents.  What makes it real KM is that you can copy a past course into the new course so I can easily grow the repository over time and pass it forward....murray