HydroDesktop is a free and open source GIS enabled desktop application that helps you search for, download, visualize, and analyze hydrologic and climate data registered with the CUAHSI Hydrologic Information System. HydroDesktop is a free software tool for finding time series of water and climate data submitted by the hydrologic research community as well as water agencies and data curators around the world. This community publishes their data so that it can be searched by other users in this common geographic interface. Users can search for data by type, location, and within certain date ranges. Users can view the sources of data as well. All available data in a specific map area will be returned. Point locations for the data will be displayed on the map with respective metadata about the collections at those stations. Users can then download the data to explore it in graph or table form. Extensions enable more sophisticated on-screen analysis of downloaded data, including integration with R and OpenMI. Users can also export data to their local computers for use in other programs.