| Commercial Software | Similar Open Source | Download Links | License | Used where |
|---|---|---|---|---|
| MATLAB | Scilab | Link | CeCILL | Engineering (Electrical, Mechanical, Civil, Electronics, Embedded systems, Chemical), Science (Physics, Mathematics) |
| Mathematica | Maxima | Link | GPL | Mathematics, Engineering |
| Cadence pSpice | ngspice | Link | BSD | Engineering (Electrical, Electronics, Embedded systems) |
| Microsoft Office | Open office | Link | LGPL | All branches |
| Microsoft Office | LaTeX | Link | LPPL | All branches |
| Mathematica/Maple | Sage | Link | GPL | Precise arithmetic, algebra, symbolic computation |
| Microsoft Windows | GNU/Linux | Link | GPL | All branches |
| Toubo C | GCC | Link | GPL | Engineering(Introductory Compyting all Branches) |
| Pro/E | BRL-CAD | Link | BSD | Engineering(CAD) |
| MASM | NASM, FASM | Link Link | BSD, BSD | Engineering(Electronics, Computer Science) |
| MS OFFICE Plotting Tools | Xmgrace, XFIG, GNUPLOT | Link Link Link | BSD, GPL,Own license (but free) | Drawing the figures, plots, flow diagrams |
| Code composer Studio, IAR Workbench | GNU Binutils | Link | GPL | Assembler, Compilers for micro controllers and DSP Processors (MSP, VC33 etc) |
| VxWORKS | RTLinux,RTAI | Link | GPL, GPL/LGPL(kernel and user space respectively), | Real-time operating System for Desktop and Embedded Systems |
| KEIL 8051 | SDCC | Link | GPL | GCC SDCC compiler for 8051 controlers |
| synopsis-CosmosSE, Mentor-Icstudio, Cadence-Virtuoso | Xcircuit | Link | GPL | schematic design |
| Mentor-ICstation, Cadence-Virtuoso | Magic | Link | BSD | Used for chip Layout |
| Modelsim | ghdl, freehdl | Link Link | GPL | VHDL compiler |
| Matlab | Octave | Link | GPL | Numerical Computation |
| AutoCad | KiCad, FreeCad | Link Link | GPL | CAD system |
| S-Plus | R | Link | GPL | Statistics |
| Operating System | GNU/LINUX | Link | GPL | Operating System |
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