Dear Francis, the embedded link to the results for a brief Google Scholar search may guide your thoughts somewhat. The second link provides a URL for a guide to Web 2.0 mind mapping and brainstorming tools. Good luck.
Dear Francis, please also find a few (mostly) free apps that can be used in brainstorming, as well as a post explaining the benefits of virtual brainstorming.
Dear Leona, I published a paper on this topic, in particular on the use of the game Minecraft in a process of teaching and learning. But it is in Portuguese