Fortran

Open-source explicit finite element solver for simulating crashes, impacts, explosions, and other dynamic events.

Energy Exascale Earth System Model source code. NOTE: use "maint" branches for your work. Head of master is not validated.

PyClaw is a Python-based interface to the algorithms of Clawpack and SharpClaw. It also contains the PetClaw package, which adds parallelism through PETSc.

Tinker: Software Tools for Molecular Design

Fortran command Line Arguments Parser for poor people