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ACD/ChemSketch 3.5 Freeware
Software from ACD for drawing chemical structures, reactions, and schematic diagrams. Windows 3.1 and above. Program (4.4 MB) and documentation (410 kB) can be downloaded after free registration.

Air and Exhaust Gas Properties
Calculation of enthalpy, entropy, heat capacity, and density for given temperature and pressure, shareware for MS Windows, 380 kB to download.

AQUAlibrium
Software package by John Carroll for predicting fluid phase equilibria in natural gas-water systems; runs under DOS. Site also includes some excellent tutorials on phase equilibrium calculations and an introduction to gas hydrates.

ChemApp© Light
Free version of ChemApp, programmer's library with subroutines for the calculation of multicomponent, multiphase chemical equilibria and the associated energy balances. Many versions for various compilers on DOS, Windows, Unix, and Macintosh platforms.

Chemical Engineering MathCAD Users' Group
Web site for MathCAD users to share worksheets that perform calculations useful in Chemical Engineering. The programs contributed to this site are freely accessible to the public for personal use.

Chemical Kinetics Simulator
Software developed at IBM's Almaden Research Center for the simulation of chemical reactions. Versions for Windows 3.x/95/NT, OS/2, and Mac available for downloading.

ChemicaLogic SteamTab Companion
A free Windows 9x/NT application for the thermodynamic and transport properties of water and steam, based on the IAPWS-95 formulation.

ChemicaLogic SteamTab Duo
Steam table with a choice of property formulation for all popular spreadsheet applications. Fully functional demo available.

Chemical Reaction Network Toolbox
DOS program (390 kB) from Marty Feinberg to analyze the kinetics of chemical reaction networks. Runs also under Windows 3.11 and Windows 95.

CONFORM
Auxiliary program for the conversion of concentrations. Converts mass ratio, mole ratio, mass fraction and mole fraction for up to six components defined by its chemical formulas. Freeware for Windows 3.1 and above. 100 kB to download.

Cranium
From MKS, Inc., Windows 95/NT property estimation software. 20 physical properties for pure compounds and mixtures. Commercial but there's a free Lite version which can be downloaded after completing a form.

CyclePad
Construction and analysis of thermodynamic cycles, freeware for educational purposes, Win 95/NT or WfW 3.11 with Win32, 3 MB to download.

DynaFit - Kinetic Data Analysis
Program for simulation and least-squares fitting of chemical kinetic data. Freeware. Registration optional.

ELEMENTAL
A periodic table program for DOS. Provides information about the indvidual elements. Demo available..

Energy Conversion
From Engineering Software, software package for calculation of thermodynamic and transport properties as well as analysis of power cycles and compressible flow, Windows 3.X/95/NT, demo available.

Engineering Software Database: Thermodynamics, Combustion, and Chemical Balance Analysis
ASME collection of software from thermodynamics and related fields. Includes both shareware/freeware and commercial applications. Descriptions of the programs and links for downloads (if shareware) from ASME FTP site are given.

EQS4WIN 1.1.8 (July 31/97)
Free Lite version of a program that solves equilibrium problems from a wide range of fields using the unified theoretical approach and algorithms of Smith and Missen. For Windows 3.1/95/NT.

FACSIMILE
Commercial kinetic modelling software from AEA Technology, for solving and modelling complex chemical reactions. Can also fit rate constants to measured data.

FACT-Win
Thermochemical database for Windows 95/NT. Documentation and slide show presentations on some of the FACT-Win programs are available for download.

INPROP
Calculation of P-V-T behavior and transport properties for single and multicomponent hydrocarbon and related systems. Commercial program from Neotec.

Kinetics2000^TM
Program for reducing and calculating kinetic parameters from a wide range of experimental techniques and data. Windows 95/98/NT.

Kintecus
A reaction kinetics problem solver. Available for Windows 95 and various workstations (SGI, IBM, Sun). Shareware.

MINEQL+, A Chemical Equilibrium Modeling System
Free software to calculate chemical equilibria. Includes graphical display of output, calculation of acid/base, redox and precipitation reactions, surface adsorption calculations, synthetic titrations.

MoistAirTab(TM)
Spreadsheet add-in from ChemicaLogic for Microsoft Excel and Lotus 1-2-3, provides functions for the psychrometric properties of moist air, pressure range restricted demo (5 bar only) can be downloaded.

Molecular Weight Calculator v1.1
A molecular weight calculator for download. MS Windows application. Freeware.

NIST/ASME Steam Properties Database
Provides water properties over a wide range of conditions based upon the IAPWS 1995 formulation for general and scientific use; Windows 3.x/9x/NT; online purchase possible.

OMDI Pure Component Tools
Excel add-in (XLL) providing pure component property data for over 600 compunds. Requires Microsoft Excel v5.0 for Power Macintosh or Windows NT, or v7.0 for Windows 95. Fully functional demo available.

Periodic Table v1.0
An MS Windows application that shows some data about the atoms. Freeware.

PhysProps
Database and estimation tool for chemical and physical properties of pure substances. Fully functional 14-day trial version for Win 9x/NT available for download (12 MB).

Prode thermoPhysical Properties Generator
Dynamic Link Library (DLL) with procedures for calculating thermodynamic and transport properties that can be used from various spreadsheets or Visual Basic, C, C++ programs. Evaluation copy available after registration.

ProPred
Program for drawing and physical property estimation of organic compounds using group contribution methods and correlations, Windows 9x/NT.

PsyCalc
Comprehensive psychrometric calculator for Windows 3.1/9x/NT, fully functional free student version for colleges and universities as well as a 30 day trial version for everyone else available.

SimChem for Windows
Free molecular dynamics simulation program for teaching and experimentation. Runs under Windows 95 or Windows 3.1.

Steam Properties
MS Windows application that calculates properties of steam/water within a wide range of pressure and temperature. Shareware.

Steam Tables
From WinSim, free DOS programs and a DLL for calling from Win32 programs based on the 1967 ASME steam tables.

Thermodynamic Databases
Commercial thermodynamic databases from AEA Technology: NIST Chemical Kinetics Database, SGTE pure element, substance, solution, and molten salt databases, Thermotech Databases with material specific data for commercial alloys.

Thermo Utilities v2.0
From Taftan Data, MS Excel add-ins for design, analysis, and optimization of power plants and air conditioning systems. Demo available.

TMS
Program for selecting an appropriate thermodynamic model for a given problem, Windows 9x/NT.

UNIFAC Activity Coefficient Calculator
A free Win 95/NT program for the calculation of liquid activity coefficients. There is also a concise description of the UNIFAC method on this site.

VLECalc
From William D. Kovats, Windows 95/NT program for vapor-liquid equilibrium calculation and batch distillation simulation using UNIFAC and NRTL, free for non-commercial and educational use, requires MS Excel 97 and Visual Basic 4 Runtime Library, 1.67 MB.

WASP
Water and steam properties calculation program for Windows 95. Shareware.

WinMetric
Integrated calculation software for Win 3.1/95/NT. Includes unit converter, database of equations, constants and properties, thermodynamic and transport properties of steam and air, among others. Time limited demo can be downloaded (660 kB).