Heatmap plugin creates a Ripple question type of "Heatmap." Heatmap allows a presenter to specify an image url that is sent to the audience. The audience can then click on a part of the image to identify a location and send that as a hotspot to presenter. Presenter display cumulates hotspot data in a heatmap.
There is no configuration for this plugin.
In "plugins" directory of Ripple core:
git clone https://github.com/uoregon-img/ripple-heatmap.git heatmap
OR
Download project and install unzipped files in "plugins" directory of Ripple core.
All files are covered under the GPL v3 license. Please see LICENSE.TXT for specifics.