The trend in mapping at the moment is to use the word 'Open', which is of course is a good thing as it normally means free access to data and a community driven initiative. Which brings us to the latest to hit our radar - Open Green Map, see the video above for an overview.
Open Green Map interactively charts natural, cultural and green living sites at a community and global scale. The Green Map System promotes inclusive participation in sustainable development and is currently engaging communities in 55 countries.
As they say, 'Think Global, Map Local!, Think Global, Map Social!' More information at GreenMap.org