insFEM. I do a lot of the simulations for CFD (and others) using this FORTRAN code. It was developed during my PHD with a lot of friends and colleagues. Although it is by no means an easy task to make it run and to find how everything works, anyone is welcome to use it.
rsg-py. This a reduced basis generator Python code that works with FEniCS. it imports the objects from FEniCS, and I/O data using h5py.
