Magma Design Automation   -    EDA Tools for layout, etc

     Mentor Graphics   -    EDA Tools for digital, analog, pcb, etc.

     Synopsys   -    EDA Tools for digital, analog, pcb, etc

     Cadence    -   EDA Tools for digital, analog, pcb, etc.

    Celoxica   -     EDA Tools for ESL development

    Elgris     -     Electronic Tools for EDIF data format translation, etc

    Xilinx    -    FPGA and Development Tools, sram based

     Altera    -   FPGA and Development Tools, sram based

     Actel     -     FPGA and Development Tools, flash based