Talkfactory was designed to help enhance the quality of debates in classrooms. It is a simple, free, web based app that allows you (or participants in the debate) to log the nature of the contributions to the discussion and display the results as a bar chart and timeline.
You can configure it so that the data capture buttons (on the right in the screenshot) run along the bottom of the screen - which might be useful if using it on an interactive whiteboard with small people. You can also change the wording on the data capture buttons - for example, with a small group you might put in each person's name so you can see how often they each contribute.
You could also use it for something completely different, such as to capture how often you get a 2 when you throw a die or to capture up to six 'behaviours' during a lesson - anything that involves a sequence of events, with up to six options.
If you give it a try then let me know what you used it for and how useful it was.