Open edX Ginkgo is the name of the latest open edX release. This new release includes significant changes to the course outline, video player, administering exams, and more!
Open edX Ficus is the name of the latest open edX release. It brings new and improved functionalities and performance and security upgrades.
The Dogwood named release, being the 4th release of the open edX platform by edX, is planned to be out there before the end of 2015. One of the main engineering challenges for this release will be migration of the Django framework from 1.4 to Django 1.8.
In order to make it easier for people in the Open edX community to collaborate and share knowledge over the Open edX codebase, edX has created a strategy of named releases, that will provide stable points for the Open edX initiative around the world to start working from. The first one of such named releases is called Aspen.