HUBzero includes a powerful content management system built to support scientific activities. Users on a hub can write blog entries and participate in discussion groups, but they can do so much more. They can work together in projects, publish datasets and computational tools with Digital Object Identifiers (DOIs), and make these publications available for others to usenot as dusty downloads, but as live, interactive digital resources. Simulation/modeling tools published on a hub can be accessed with the click of a button. They run on cloud computing resources, campus clusters, and other national high-performance computing (HPC) facilities and serve up compelling visualizations.