Description
LibreCAD is a fully comprehensive 2D CAD application that you can download and install for free. There is a large base of satisfied LibreCAD users worldwide, and it is available in more than 20 languages and for all major operating systems, including Microsoft Windows, Mac OS X and Linux, including Debian, Ubuntu, Fedora, Mandriva, Suse, etc.
LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation is free from our large, dedicated community of users, contributors and developers. You, too, can also get involved!

GNS3

A graphical network simulator to design and configure virtual networks

Build, Design and Test your network in a risk-free virtual environment and access the largest networking community to help. Whether you are studying for your first networking exam or building out a state-wide telecommunications network, GNS3 offers an easy way to design and build networks of any size without the need for hardware. And the best part is it's free!

GNU PLOT

Gnuplot 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.

Gnuplot supports many different types of 2D and 3D plots

Here is a Gallery of demos.

Gnuplot supports many different types of output

interactive screen display:		cross-platform (Qt, wxWidgets, x11) or system-specific (MS Windows, OS/2)
direct output to file:		postscript (including eps), pdf, png, gif, jpeg, LaTeX, metafont, emf, svg, ...
mouseable web display formats:		HTML5, svg

OpenCV

Open Source Computer Vision Library

Description
The Open Source Computer Vision Library has >2500 algorithms, extensive documentation and sample code for real-time computer vision. It works on Windows, Linux, Mac OS X, Android and iOS. OpenCV is released under a BSD license and hence it’s free for both academic and commercial use. It has C++, C, Python and Java interfaces and supports Windows, Linux, Mac OS, iOS and Android. OpenCV was designed for computational efficiency and with a strong focus on real-time applications. Written in optimized C/C++, the library can take advantage of multi-core processing. Enabled with OpenCL, it can take advantage of the hardware acceleration of the underlying heterogeneous compute platform. Adopted all around the world, OpenCV has more than 47 thousand people of user community and estimated number of downloads exceeding 9 million. Usage ranges from interactive art, to mines inspection, stitching maps on the web or through advanced robotics.

Categories
Robotics, Human Machine Interfaces, Realtime Processing

License
BSD License

Programming Without Coding Technology

Description
PWCT is not a Wizard for creating your application in 1 2 3 steps. PWCT is a general-purpose visual programming tool designed for novice and expert programmers.

A novice programmer can use PWCT to learn programming concepts like Data Structure, Control Structure, Programming Paradigm,..etc.

An expert programmer can use PWCT to develop large and/or complex software. Using PWCT we developed a textual programming language Compiler and Virtual Machine, This language called Supernova . Another projects developed using PWCT are the Smart POS System and the Critical Nodes Application.

You can see/edit the generated source code. PWCT support Harbour, Supernova, C, Python, & C#.NET and you can extend PWCT to support code generation in any text based programming language.

PWCT comes with many samples, tutorials & movies. Programming Without Coding Technology Web Site

Categories
Software Development, Artificial Intelligence, Education

License
GNU General Public License version 2.0 (GPLv2)

Sweet Home 3D

An interior design application to draw house plans & arrange furniture

Description
Sweet Home 3D is an interior design application that helps you to quickly draw the floor plan of your house, arrange furniture on it, and visit the results in 3D.

Categories
3D Modeling, 3D Rendering, Simulations

License
GNU General Public License version 2.0 (GPLv2)

Operating System

1. Windows
2. Mac Os
3. Sun
4. Linux

Features

• Draw walls and rooms upon the image of an existing plan, on one or more levels
• Drag and drop doors, windows and furniture from a catalog onto the plan
• Update colors, texture, size and orientation of furniture, walls, floors and ceilings
• View all changes simultaneously in the 3D view from any view point
• Create photorealistic images and videos with various light sources
• Import additional 3D models and export the plan at various standard formats

OpenFlower

Description
OpenFlower is a free and open source CFD code (for Linux and Windows) mainly intended to solve the turbulent incompressible Navier-Stokes equations with a LES approach. It can deal with arbitrary complex 3D geometries with its finite volume approach.

Categories
Physics, Simulations

License
Academic Free License (AFL), GNU General Public License version 2.0 (GPLv2)

                                                      Operating System