"Use our softwares to analyse a wide variety of technical problems. Save hundreds of hours of analysis compared to other approaches. For example, use of a hand calculator and pencil-paper, spreadsheets or other thermochemical calculation programs."

At GTT-Technologies we are constantly engaged in the development of our software packages for serving the thermochemical needs of industry and academia. This section provides background information on our software family.

The software ranges from the fully integrated thermodynamic databank system for interactive use to the programmers library for thermochemical applications. The following list provides brief descriptions of all software products:

• FactSage
  FactSage is the single successor to both FACT-Win and ChemSage. It combines the powerful calculational capabilities of ChemSage developed by GTT and the very versatile and userfriendly graphical user interface generated by FACT/CRCT into the most powerful and versatile interactive program available in the field of computational thermochemistry. FactSage users benefit tremendously from the synergy brought about by the close co-operation of FACT/CRCT and GTT-Technologies.

• ChemApp
  ChemApp provides the powerful calculation capabilities contained in the Phase Equilibrium modules of ChemSage and FactSage in the form of a programmer's library. It consists of a rich set of subroutines which provides all the necessary tools for the calculation of complex multicomponent, multiphase chemical equilibria and the determination of the associated energy balances. When the equilibrium calculation has been performed the user can access the values of a multitude of variables such as total pressure and volume, temperature, phase amounts, phase internal concentrations of phase or system components, chemical potentials of system components or activities of species, heat capacity, enthalpy, entropy or Gibbs energy of the system or a particular phase.
  ChemApp light is the free version of ChemApp, giving you almost the same functionality as the regular version of ChemApp. ChemApp light is available for download for a number of platforms, and comes with complete online documentation, dozens of code examples in both FORTRAN and C, and support via e-mail.
• ChemSheet
  ChemSheet combines the flexibility and practicality of spreadsheet applications with the rigorous, multi-phase thermodynamic calculations of ChemApp. Each application is defined as an independent worksheet in Excel®, in which the entire simulation can be done.
  Based on ChemApp light there is also a ChemSheet light version which is available for downloading and testing.

• SimuSage
  SimuSage is a tool for users who want to built process models according to the flowsheeting concept. It provides the capabilities of ChemApp in a set of graphical components which are integrated in the Delpi programming environment. For processes of moderate complexity a complete program can be generated simply by drag-and-drop of the graphical icons of the appropriate unit operations. For models of higher complexity it is possible to make additional use of the powerful capabilities of Delphi.