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.
Fluent Inc. - Provide CFD Flow Modeling Software and Services. News, products, consulting services and technical support.
fluidyn - Software developed by Transoft International in the field of computational fluid dynamics, heat transfer, structural mechanics, environmental engineering and ground water pollution.
PORFLOW - Enables groundwater engineers and nuclear waste management professionals model flows in porous media over extended periods of time.