Alternative System Concepts, Inc.  
   On-Line Documentation.
   http://www.ascinc.com/

CAST, Inc.  
   An intellectual property provider that develops and supports synthesizable cores and simulation models for electronic design using VHDL.
   http://www.cast-inc.com/

RASSP Support Page for VHDL  
   Models, Guidelines and Coding Styles, Standards, Courses/Tutorials, Tools
   http://www.eda.org/rassp/vhdl/index.html

Hamburg VHDL Archive  
   Home of many free, open source designs in VHDL.
   http://tech-www.informatik.uni-hamburg.de/vhdl/vhdl.html

VHDL International (VI)  
   organization dedicated to cooperatively and proactively promoting the Very High Speed Integrated Circuit (VHSIC) Hardware Description Language (VHDL) as a standard worldwide language for the design and description of electronic systems
   http://vhdl.org/

comp.lang.vhdl archive  
   Frequently Asked Questions and answers.
   http://vhdl.org/comp.lang.vhdl/

VHDL Verification Course  
   Introduction to VHDL verification techniques. It assumes some familiarity with VHDL.
   http://www.stefanvhdl.com/

Special Interest Group on Design Automation: SIGDA  
   Links, programs, archives, news. [Association for Computing Machinery: ACM]
   http://jamaica.ee.pitt.edu/

VHDL Builder  
   Resource related to VHDL, orcad, and links to VHDL simulators.
   http://www.vhdlbuilder.com/

SAVANT  
   The University of Cincinnati's free VHDL analyzer/parallel simulator.
   http://www.ececs.uc.edu/~paw/savant/

VHDL Page  
   Information on vhdl verilog and synthesis resources around the web. Includes tutorials, models and code generators.
   http://www.angelfire.com/electronic/in/vlsi/vhdl.html

Doctor VHDL Design Services and Training  
   VHDL and ASIC / FPGA training courses as well as design services.
   http://www.drvhdl.com/

Raja's Personal Information: VHDL  
   Some VHDL design examples.
   http://www.geocities.com/rajsekharp/vhdl_source_code.html

Andy Rushton - VHDL for Logic Synthesis  
   Andy Rushton, ECS Deartment, Southampton University. Web site for the book "VHDL for Logic Synthesis" and for a mini-FAQ for VHDL users.
   http://www.ecs.soton.ac.uk/~ajr1/

Synthesizable VHDL Models  
   Contributed by ALTERA Corporation.
   http://www.edif.org/lpmweb/more/vhdl.htm

VHDL Mini Reference  
   For quick access.
   http://www.eng.auburn.edu/department/ee/mgc/vhdl.html

VHDL Models  
   From Free Model Foundry site.
   http://vhdl.org/fmf/wwwpages/VHDL_models.html

Hello, World Program  
   Written in VHDL.
   http://www2.latech.edu/~acm/helloworld/VHDL.html

CQPIC  
   Free synthesizable HDL for a PIC16F84. Also related links.
   http://www02.so-net.ne.jp/~morioka/cqpic.htm

VHDL Memo  
   All VHDL keywords, all VHDL syntax. VHDL quick documentation.
   http://www.amontec.com/fix/vhdl_memo/

VHDL Designer's Guide  
   What is VHDL? A Brief History of VHDL. Tutorial.
   http://www.doulos.com/knowhow/vhdl_designers_guide/

Doulos KnowHow - VHDL Models  
   Generic Large-capacity RAM Model, Analog-to-Digital Converter Model, Finite Impulse Response (FIR) Filter, Image Processing Cache Register Array (IPCRA), Carry Look Ahead Blocks, Synchronizer Scaler, Heap Sort Parallel, Simple RAM Model, Spectrum Spread
   http://www.doulos.com/knowhow/vhdl_models/

VHDL and FPGA Resources on the Web  
   Directory VHDL tutorials, papers, examples, tools.
   http://www.geocities.com/SiliconValley/Heights/8831/vhdlfpga.html

Emacs VHDL Mode  
   Emacs/XEmacs mode for editing VHDL code.
   http://opensource.ethz.ch/emacs/vhdl-mode.html

Amontec VHDL Window  
   Provides complete online language reference and examples of common constructs.
   http://www.amontec.com/vhdl_part.shtml

Free Model Foundry: FMF  
   Premier site for VHDL component simulation models.
   http://www.eda.org/fmf/wwwpages/