Moodle vs BlackBoard

https://www.insidehighered.com/news/2014/02/13/moodle-tops-blackboard-among-small-colleges-analysis-says
http://www.ispringsolutions.com/blog/moodle-vs-blackboard/
http://uki.moodlerooms.com/
http://9thlevel.ie/tag/moodle/
http://enhancingteaching.com/2013/03/25/interested-in-collaborating-on-moodle-2/
https://www.timeshighereducation.com/news/cyberattack-shuts-down-virtual-learning-platform/2020378.article