The Variable Infiltration Capacity (VIC) model is a semi-distributed grid-based macroscale hydrology model which solves for full water and energy balances. It was developed at University of Washington and Princeton University and is based on the work of Xu Liang. The VIC model in its various forms has been applied to the Columbia, the Ohio, the Arkansas-Red, and the Mississippi River Basins, and also to many other large river basins around the world.
The VIC model code and lots of information about running the model are available at the VIC model home page at the University of Washington
The TOPMODEL-Based Land Surface-Atmosphere Transfer Scheme (TOPLATS) is capable of incorporating satellite-based observations and realistically represent land surface-atmosphere interactions. As in the TOPMODEL, the lateral redistribution of subsurface water is dependent on the local topography and soil transmissivity. The model was developed at Princeton University and is based on the dissertation work of Jay Famiglietti. It was later modified by Christa Peters-Lidard and Wade Crow, among others.
The TOPLATS model code is available here