AMUSE: The Astrophysical Multi-Scale Environment
Bonsai: A GPU-enabled tree-code.
CUDA / OpenCL wrapper: Wrapper library for CUDA and OpenCL functions.
MUSE: the Multiscale Multiphysics Scientific Environment, a package to combine astrophysical codes.
MPWide: the light-weight communication library.
NBabel: N-body integrators in different languages.
Octgrav: A GPU-enabled tree-code.
Sapporo: A graphics library to calculate gravitational dynamics on your GPU! (Latest version 1.6)
SUSHI: A cosmological N-body code which can be used to simulate the Universe across supercomputers.