saket

Hi! I want to develop a education based social networking site where most of the content will be generated and managed by users only. Users will manager their content. I am confused about which open source software to use. I want to make it a commercial website. Can you please guide me about strength and weaknesses of various softwares so that i can decide on it. Currently i have following softwares in my mind: Elgg Jamoola Mahara Moodle. Please help me . Also i want to develop it in minimum budget. Thanks & Regards Saket