Last week, Nathan Vexler of the University of Waterloo, and Khalid Baheyeldin of 2bits.com presented at the Waterloo Region Drupal Users Group on Backdrop.
Backdrop is a fork of Drupal, based mostly on Drupal 7.x, and mostly compatible with its API. It also has some features from Drupal 8.x. It aims to provide an alternative that reduces the cost of ownership by minimizing the learning curve for developers.
Note: the slides from this presentation were superseded by my talk at Drupal North 2015.
