A masterpiece found by random surfing on the web: openHABs contributation activity visualized like a 2D space shooter 
openHAB 2 Add-Ons: http://ghv.artzub.com/#repo=openhab2-addons&climit=350&user=openhab
Eclipse SmartHome: http://ghv.artzub.com/#repo=smarthome&climit=350&user=eclipse
When loading is completed, click on Run at the top bar. Each light ray / dot represents a file in the repository. It’ll always go to the last modifier, the visualization renders the movement of these dots over time (there is a status bar at the bottom). Have fun 
