• CSDMS - Community Surface Dynamics Modeling System; great open source project
• Consortium of Universities for the Advancement of Hydrologic Science
• HydroDesktop
• HydroPlatform Python based platform in Thuban environment
• Whitebox Geospatial Analysis Tools
• istSOS - project based on Sensor Observation Service OGC standard
• Kalypso - Java based (article)
• PIHM - Penn State Integrated Hydrologic Modeling System; QGIS based
• Orange - Open source data visualization and analysis (Python)
• ENKI - Windows based hydrological framework
• Flood marks - Database of flood (high water) marks

Library