IGOR Pro: Technical graphing and data analysis software for scientists and engineers

IGOR: Technical graphing and data analysis software for scientists and engineers

GOR Pro is an interactive software environment for experimentation with scientific and engineering data and for the production of publication-quality graphs and page layouts. IGOR has been used by tens of thousands of technical professionals since its introduction in 1989.

Download the fully-functional IGOR Pro 6.3 and try it free for 30 days after installation. After 30 days, the IGOR will lapse into limited functionality demo mode. The limitations of the demo mode are:

• Saving is disabled.
• The clipboard contents cannot be transferred to other programs.
• The printing output is lightly over-printed with IGOR-related words.

http://www.wavemetrics.net/

vfplot: create very nice 2D vector plots (free)

vfplot: A program for plotting two-dimensional vector fields
free, opensource
http://soliton.vm.bytemark.co.uk/pub/vfplot/index.html

enGrid: Open-Source mesh generation/ Pre-Processing

enGrid is an open-source mesh generation software with CFD applications in mind. enGrid uses an in-house development for surface meshing and prismatic boundary layers; a module for hex far-fields will be added in the next release. Tetrahedral parts of the mesh are created by calling the Netgen library. Internally, enGrid uses the VTK data structures as well as the *.vtu file format.
Currently enGrid has interfaces to Blender [3], Gmsh, STL, and a few other file formats. Gmsh can be used to import STEP and IGES files and it can also be used for simple geometry modeling.
Since the 1.2 release, enGrid provides native export to OpenFOAM® and since 1.4 for SU2. This includes export capabilities for complete OpenFOAM cases (including boundary conditions), as well as support for polyhedral cells. enGrid is released under the GPL and we hope that it is a useful addition to the open-source CFD community.

http://engits.eu/en/engrid

VISIT: free software for ploting, visualization your computation result, post-processing

VISIT (free)
https://wci.llnl.gov/codes/visit/home.html

VisIt is a free interactive parallel visualization and graphical analysis tool for viewing scientific data on Unix and PC platforms. Users can quickly generate visualizations from their data, animate them through time, manipulate them, and save the resulting images for presentations. VisIt contains a rich set of visualization features so that you can view your data in a variety of ways. It can be used to visualize scalar and vector fields defined on two- and three-dimensional (2D and 3D) structured and unstructured meshes. VisIt was designed to handle very large data set sizes in the terascale range and yet can also handle small data sets in the kilobyte range. See the table below for more details about the tool’s features.

History

VisIt was developed by the Department of Energy (DOE) Advanced Simulation and Computing Initiative (ASCI) to visualize and analyze the results of terascale simulations. It was developed as a framework for adding custom capabilities and rapidly deploying new visualization technologies. After an initial prototype effort, work on VisIt began in the summer of 2000, and the initial version of VisIt was released in the fall of 2002. Although the primary driving force behind the development of VisIt was for visualizing terascale data, it is also well suited for visualizing data from typical simulations on desktop systems. Because of its applicability beyond visualizing terascale data, we are making VisIt freely available.

Gnuplot: free software for plotting, visualization

Gnuplot 
(alternative some plotting utilies of Matlab, Excel, plot figures for your paper)
is a portable command-line driven graphing utility for Linux, OS/2, MS Windows, OSX, VMS, and many other platforms. The source code is copyrighted but freely distributed (i.e., you don't have to pay for it). It was originally created to allow scientists and students to visualize mathematical functions and data interactively, but has grown to support many non-interactive uses such as web scripting. It is also used as a plotting engine by third-party applications like Octave. Gnuplot has been supported and under active development since 1986.

Post-processing: ParaView

ParaView: open-source, multi-platform data analysis and visualization application http://www.paraview.org/
It works well with both solid and fluid modelling

Post-processing: FloVIZ Viewer

Free Post-processing tools for FloTHERM, FloTHERM PCB, FloVENT products from Mentor Graphics
http://www.mentor.com/products/mechanical/downloads/floviz-viewer/

Post-processing: EnSight for both CFD and FEA

Another commercial post-processing: Ensight  http://www.ceisoftware.com/

Post-processing: Tecplot

The best Tecplot forum: to discuss and learn more about Tecplot, link.

Tecplot in cyclopaedia, http://en.cyclopaedia.net/wiki/Tecplot

Tecplot in Wiki, en.wikipedia.org/wiki/Tecplot

Tecplot 7 Tutorial, http://www.me.umn.edu/courses/old_me_course_pages/shortcourses/tecplot/index.shtml