HullDrag/32
Estimates a yacht's hull resistance and suggests optimum values for LCB, Cp and LCF based on a target optimisation speed.
http://www.zwakenberg.de/hulldrag/

Piping Systems Fluid Flow
Software for the design and optimisation of pipe networks, transporting compressible or incompressible fluids. Windows. Free download of demonstration version.
http://www.fluidflowinfo.com/

AeroLogic
The company which produces PSW, a program for visualizing fluid flow.
http://www.aerologic.com/

Hanley Innovations
Provides software for rapid aeordynamics conceptual design and analysis. Useful for education and industry.
http://www.hanleyinnovations.com

Pipesize
Excel spreadsheet template that calculates pressure drop, velocity and heat loss for gases and liquids flowing through pipes.
http://www.chemengsoftware.com/pszintro.htm

Advanced Aerodynamics Software
Software for airfoil aerodynamics by Dr. Hanley including the library of NACA 4, 5 and 6 digit airfoils. Computes lift, drag, moments and the Fourier coefficients for thin airfoil theory. Visualizes streamlines, pressure contours and boundary layers.
http://www.hanleyinnovations.com/vfnaca.html

DispSim Random Walk Model
A random walk simulation of longitudinal dispersion in open channel flow. Written in C++ and published under GNU license.
http://www.geocities.com/andyjmoores/

PHOENICS
Computational fluid dynamics software suite from CHAM for the simulation of fluid-flow, heat-transfer and chemical reaction processes.
http://www.cham.co.uk/phoenics/d_polis/d_info/phover.htm

Icepak Electronics Cooling Software
Predicts air flow and heat transfer at component, board and cabinet levels.
http://www.icepak.com

Process Ace Software
Offers a centrifugal pump calculator for Palm OS handheld computer.
http://www.processacesoftware.com

The visu project
A versatile visualization tool for scientific simultation data, distributed under the GNU GPL.
http://visu.sourceforge.net

Fluid Power Resources
Software and data for hydraulics engineers.
http://www.fluidpowertools.com

ViziFlow
Fluid flow modeling and streamline and pressure visualization in piping systems and around airfoils.
http://www.viziflow.com

Aerodynamic Analysis of Arbitrary Airfoil
Calculates aerodynamics coefficientes and their variations for different angles of attack. Plots Velocity and pressure field.
http://www.manquehue.net/RLMSoftware

Phoenics Reader
Post-processing software for CHAM Phoenics CFD.
http://htex.mpei.ac.ru/~krinitsky/index1.html

Flovent
CFD-based analysis software and consultancy services for simulation of building heating, airflow and ventilation.
http://www.flovent.com

Pointwise Inc.
Grid generation software and services centered around the Gridgen software product: a multi-block, structured grid generator for computational fluid dynamics and finite element analysis. Based in Fort Worth, Texas, USA.
http://www.pointwise.com/

Flow Science Incorporated
FLOW-3D, CFD software specializing in free surface flows, metal casting, fuel sloshing, ink jets and hydraulics. Based in Santa Fe, NM, USA.
http://www.flow3d.com/

Flomerics
CFD-based thermal and ventilation analysis software products and services, FLOTHERM and FLOVENT. TLM-based electromagnetic analysis software products and services, FLO/EMC and Micro-Stripes.
http://www.flomerics.com/

Cambridge Flow Solutions Ltd.
Proprietary CAD, mesh and CFD software with application examples, including Formula 1 aerodynamics and unsteady combustion, from a network of developers based in Cambridge, UK.
http://www.cambridgeflowsolutions.com/

Analytic and Computational Research, Inc.
ACRi specialises in Computational Fluid Dynamics (CFD) software and consulting services. Online purchase of their software.
http://www.acricfd.com/

Airfoil Analysis Software
Windows software for analyzing airfoils using CFD and analytical techniques. VisualFoil can export an O-Mesh for finite difference/volume CFD analysis. On-line purchase.
http://www.hanleyinnovations.com/airfoils.html

Ricardo Software
Simulation software for mechanics, gas dynamics and fluid mechanics, focusing on internal combustion engines and vehicles. Marketing, training, support.
http://www.software.ricardo.com

GDT Software Group - GasDynamicsTool - CFD software for numerical simulation of gas-dynamics process
The GasDynamicsTool (GDT) is a computational package intended for numerical simulation of gas-dynamical processes within a broad range of initial and boundary conditions.
http://www.cfd.ru

Flownex
System CFD simulation software for performing detailed analysis and design of compressible and incompressible thermal-fluid systems such as complex pipe networks
http://www.flownex.com

Pipe Pressure Loss Calculator
Free of charge Windows2000/XP program to calculate the pressure loss in a pipe using different methods. The web page contains formulas and tables related to the pressure loss calculation.
http://arash.dejkam.com/software/pressure_loss/

Numeca
Software for Computational Fluid Dynamics (CFD) design and automation.
http://www.numeca.be/

SingleChips
Natural gas flow calculator.
http://www.singlechips.com/flowvb/fcalc.html