Gource is a really cool visualization tool, and although it's originally intended to show software development over time, it's useful for showing other community works over time. Here is a visualization of the development of set.mm (the Metamath Proof Explorer (MPE)), a set of formalized math proofs that's been developed over time with (now) 48 people:
I find these visualizations great to help show people how open source software contributions work. Most people get the idea that collaboration can result in amazing things, but there is nothing like a visualization actually showing it in action.
https://m.youtube.com/watch?v=XC1g8FmFcUU
I find these visualizations great to help show people how open source software contributions work. Most people get the idea that collaboration can result in amazing things, but there is nothing like a visualization actually showing it in action.