The software development is an important part of hydrological and hydrogeological research and development. The software development increases simplification and effectivity, mainly at the frequently repeated tasks. This paper introduces the usage possibilities of the new developed software tool named HydroOffice in version 2010. This tool includes teen modules with a few hundreds of functions. The main functionality is focused on time-series processing and analyzing, hydrological and statistic analysis, drought assessment, runoff components separation and analysis, 3D spatial and temporal water infiltration modelling and one-dimensional river solute transport modelling tool with inflow and storage.