It's not quite the same as this visual with columns, but I built a tree-based conversation viewer for Twitter discussions that uses a top-down representation of

It's not quite the same as this visual with columns, but I built a tree-based conversation viewer for Twitter discussions that uses a top-down representation of the tree: https://github.com/paulgb/Treeverse/blob/master/README.md https://github.com/paulgb/Treeverse/blob/master/README.md The design used in OP is clever, I didn't think to try a radial tree.