Pyramid is a software library for performing parallel adaptive mesh refinement on unstructured meshes. It uses triangular or tetrahedral elements for the adaptive mesh. A suite of well-designed and efficiently implemented modules that perform operations in a typical parallel AMR process are included.

The library is implemented in Fortran 90 with MPI and it supports mesh quality control, adaptive refinement, load balancing, mesh migration, and visualization all in parallel.

Additional information:

Pyramid Parallel Unstructured Adaptive Mesh Refinement Library