Hello everyone!
I just wanted to share with you a new question type I developed for an experiment at my uni. I'm doing a Ph.D. on technology applied to education and I'm using Concept Mapping techniques. I developed a Concept Map question type, that allows teachers to create Concept Map questions, which are basically questions for which a Concept Map is the answer. They are manually graded and a web based Concept Map editor is included for students to answer. The editor includes undo-redo and it is very straightforward to use as it is based only on double clicking on the map to create concepts and drag and drop concepts on top of each other to create relationships.
The question type should work on Moodle 1.9+ however I have only tested it on Moodle 2.0 so I can't guarantee it will work on older versions.
Installation instructions are included in a README file in the attached zip. You can download the plugin from this link.