The i-Tree suite of software tools was developed by the USDA Forest Service, the Davey Institute and their cooperators to help users assess and manage the structure, function, and value of urban tree populations. This presentation will focus on tools within the i-Tree suite that estimate tree functions associated with rainfall interception, avoided runoff, and the naturalization of stream flows in urban areas. Special focus will be given to i-Tree Hydro, recent updates to i-Tree Eco, and the new i-Tree Landscape tool. These tools allow for assessment of existing tree infrastructure, modeling of future conditions, and prioritization of future tree plantings at scales from the individual tree to the watershed.