Aldec
HDL design entry and simulation software for programmable logic designers.
C Level Design
Offers a design and verification environment for C/C++ with synthesis to VHDL and Verilog code.
Calyptech Design Services
Offers ASIC and FPGA design and verification services, drivers and tools. Includes product and service overview and PDF detailed product specifications available.
CAST, Inc.
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.
Cypress Warp Tools
VHDL and Verilog tools for use with the Cypress CPLD family.
Doulos Ltd
Training and consultancy across Europe in VHDL, Verilog, SystemC, Perl and Tcl/Tk. Offers free resources for hardware designers.
Esperan
VHDL, Verilog and FPGA training courses held in the US, Europe and the UK.
Exemplar Logic, Inc.
Provides LeonardoSpectrum which is a CPLD, FPGA and desktop ASIC synthesis solution.
Experimental Computing Laboratory
Includes papers, presentations, conference publications and SAVANT VHDL, a free VHDL analyser and simulator. From University of Cincinnati.
eXsultation
Specialize in full turn-key, customer facility training programs in VHDL, Verilog,C++ modeling, formal verification, and FPGA design.
Freeware Verilog & VHDL
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).
Green Mountain
VHDL compilers and design environments, including Windows, DOS and Linux support.
iMODL
The iValidate toolset comprises ready-to-use functional verification tools and simulation models.
Nova Engineering
Megafunctions are modular, DSP algorithms and functional blocks for custom use in PLD or ASIC designs.
Rajesh Verilog FAQ
General Verilog resource that includes a FAQ, tutorials, and commercial information.
Sandstrom Engineering
HDL pre-synthesis tools which check code for synthesizability. Then suggest replacement code where problems are found.
Saros
Offering a full suite of VHDL and Verilog design tools, from design-entry, simulation and synthesis to verification and training.
Sutherland HDL, Inc.
Provides Verilog HDL and Verilog PLI training workshops and consulting services.
Symphony EDA
Offers a VHDL compiler/simulator with an integrated development environment. Supports VHDL'93, Vital, and SDF. Free command-line tools also available.
SynaptiCAD
Provides Verilog, VHDL, TDML, logic analyzer, pattern generator, and SPICE tools.
Synplicity
Logic synthesis and verification products for FPGA and ASIC designers.
The Hamburg VHDL Archive
A collection of public-domain or shareware, VHDL documentation, models, and tools.
Time Rover
Provides tools for aiding Verilog development. Including The Temporal Rover for automatic verification of protocols and Verilog Java PLI.
TimingTool - Online timing diagram editor
Free to use online timing diagram editor. Timing diagrams are saved in TDML format. Translators from TDML to DXF, VHDL, and Verilog are also supplied.
Translogic
EASE and EALE provide HDL aware entry tools, both graphical and text based. Also providing Linux support.
Verilog Dot Com
Verilog resources page. Includes FAQ, books and links. Also verilog aware Emacs add on.
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.