Analytic & Computational Research, Inc
Has a general purpose CFD software suite (ANSWER) for reacting/non-reacting flows. Turbulence, structured or unstructured hybrid meshes can be handled.
Flowmaster
A 1D thermo-fluid systems package to simulate fluid systems behaviour. The site features a guided tour introducing the features of the software. It gives example applications and references.
fluidyn
Software developed by Transoft International in the field of computational fluid dynamics, heat transfer, structural mechanics, environmental engineering and ground water pollution.
keyFE2
The site presents a finite element analysis software devoted to the calculation of flows. User defined equations may be added to the program.
PORFLOW
Enables groundwater engineers and nuclear waste management professionals model flows in porous media over extended periods of time.