I put this Software on my laptop... I think its very promising... You can get it at geobebra.org ... Hope this is a contribution to the people on this forum... I also have an opinion that may not be very popular with everyone on this forum... But what opinion Is popular with everyone... Here goes... I have read the User agreements of some popular social sites... Seems to me that everything a user displays or creates belongs to them or their third party partners... May be Im reading it wrong but it Seems to their the ones getting wealthy from others inspiration... Am I thinking wrong here or something.? Anyway thats my take on it. I would also like to see the copyright.gov people secure peoples Ideas.. All they would have to do is secure the Idea Storage Area... Wheres the copyright protection if they allow others and (third party) people to view ones copyrighted material.? Best Regards.