Here's something quite nifty. It delivers two things dear to my heart: maps & data visualisations. The OpenStreetMap project is a massive project that's relied on contributions from users around the world to help populate its mapping info since 2004. Think of it as the Linux or Wikipedia of the mapping world.
Now I'm not a big fan of reams of data. But I love me some data visualisation. Drop in a long shot of spinnin' planet earth, mix in a razzling instrumental and you got me rolling myself in maps & jelly doing the cartographers' cha-cha.
But on a serious note, what I like about this is the simple demonstration of the grand scale of the contribution of people. Look at what Wikipedia has become in such a short span of time. I know its content can be questionable at times, but it will correct itself in some way soon. Human beings want to contribute and share. They want to make this world a better place. And that is something that puts a smile on my face. Now where did I leave that jelly?