Desire2Learn (D2L) is the MnSCU purchased commercial product of CMS.

Prior to D2L, MnSCU paid license to WebCT. WebCT merged with Blackboard, which at the moment is the largest CMS.

in the first decade of the 21st century, dozens of commercial CMS products appeared on the market, but they were gradually absorbed mostly by Blackboard (BB). http://en.wikipedia.org/wiki/Course_Management_System

The advent of Web 2.0 tools, such as blogs and wikis offered viable alternative to the commercial CMS. Further, open source products such as Drupal and Sakai posed additional competition to commercial CRS.

Last but not least, with the advent of cloud computing, a new generation of products are competing with BB and D2L

Alternatives to D2L:
Moodle, Drupal, Sakai
Edmodo, Sophia (http://www.sophia.org/), Piazza, Prulu
http://www.quora.com/Who-are-competitors-or-other-services-similar-to-Edmodo

http://www.quora.com/E-learning/What-companies-are-Piazzas-direct-competition-in-the-edTech-space

http://wazmac.com/discussion/edmodo-v-schoology-v-moodle/

Mukurtu CMS (http://mukurtu.org) is a free and open source community archive platform and content management system built on Drupal 7

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