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PATRAN/MSC NASTRAN:
The student version is designed only for small, academic simulations. There is a node limit in the model:
ANSYS:
The academic version is designed only for small, academic simulations.
CivilFEM by MARC:
The student version is designed only for small, academic simulations. The model is limited to 5000 nodes (1000 beam elements).
CivilFEM for ANSYS:
The student version is designed only for small, academic simulations.
CFD++:
The academic version is designed only for academic simulations, with a model limit of 1,000,000 cells.
ANSYS CFX:
The academic version is designed only for academic simulations.