Aldec
- http://www.aldec.com/
- HDL design entry and simulation software for programmable logic designers.
CAST, Inc.
- http://www.cast-inc.com/
- Provides a broad line of general purpose IP cores for electronic design (also called silicon intellectual property, SIP, or virtual components, VCs). Includes processors, bus and network interfaces, multimedia and encryption functions, serial communications, and peripheral controllers.
Calyptech Design Services
- http://www.calyptech.com/
- Offers ASIC and FPGA design and verification services, drivers and tools. Includes product and service overview and PDF detailed product specifications available.
Doulos Ltd
- http://www.doulos.com/
- Training and consultancy across Europe in VHDL, Verilog, SystemC, Perl and Tcl/Tk. Offers free resources for hardware designers.
Freeware Verilog & VHDL
- http://www.v-ms.com/
- This is the home page for a Freeware Verilog,VHDL and Analog Mixed Signal project (a.k.a. the V-2000 project, still in its infancy).
Saros
- http://www.saros.co.uk/
- Offering a full suite of VHDL and Verilog design tools, from design-entry, simulation and synthesis to verification and training.
Symphony EDA
- http://www.symphonyeda.com/
- Offers a VHDL compiler/simulator with an integrated development environment. Supports VHDL'93, Vital, and SDF. Free command-line tools also available.
Time Rover
- http://www.time-rover.com/
- Provides tools for aiding Verilog development. Including The Temporal Rover for automatic verification of protocols and Verilog Java PLI.
Verilog-AMS
- http://www.eda-stds.org/verilog-ams/
- The Verilog-AMS Technical Subcommittee has been created with the charter to develop, update and promote analog and mixed signal extensions to the Verilog (IEEE-1364) language.
eXsultation
- http://www.exsultation.com/
- Specialize in full turn-key, customer facility training programs in VHDL, Verilog,C++ modeling, formal verification, and FPGA design.
iMODL
- http://www.imodl.com/
- The iValidate toolset comprises ready-to-use functional verification tools and simulation models.