HAD stands for Hyper AMR Driver. It was written using MPI and Fortran77 and supports parallel, vertex and cell centered adaptive mesh refinement. It also supports hybrid vertex/cell centered refinement schemes. HAD was developed by Steve Liebling at Long Island University. Active development began in 2004. HAD is currently used for relativistic MHD simulations as well as vacuum spacetime evolutions of the Einstein equations. HAD includes a multigrid solver and standard time integrators; HAD supports subcycling of grids in time for full time and space mesh refinement.
HAD has now been released. Download Latest HAD version here (23 Nov 2010).