EKB The Greenhouse Development Rights calculator is a Tcl/Tk application. It is a supporting tool for the Greenhouse Development Rights (GDRs) framework for allocating burden-sharing based on an assessment of responsibility for climate change and capacity for mitigating further climate change. The GDRs framework is the brainchild of people at EcoEquity and the Stockholm Environment Institute (where I work), and will be presented in a side event at the upcoming Conference of the Parties (COP) to the UN Framework Convention on Climate Change (UNFCCC). I was pretty pleased that the team was open to my developing this tool in Tcl/Tk.
And here's a screenshot: