Python:
Python Official Website: http://www.python.org/
Python Library for developing game: http://www.pygame.org/
Python Library for Plotting graph as MATLAB: http://matplotlib.sourceforge.net/
Python Imaging Library: http://www.pythonware.com/products/pil/
Python GUI(not the Tkinter): http://www.riverbankcomputing.co.uk/software/pyqt/download
Python Library for Numerical Calculation: http://numpy.scipy.org/