Isys Information Architects Inc. - Specializing in the rapid design and development of highly usable productivity software. Home of the Interface Halls of Shame and Fame

HCI Professional Services - Offers consulting internationally with companies interested in making their Web based and desktop applications more effective through improved usability and usage-centered design.

Interface Consult - Offers Usability Testing Facilities and a Usability Lab, other products.

MAYA Design Group - MAYA is a product-design and development consultancy that specializes in "taming the complexity" of technology.

British HCI Group Consultancy Listing - Listing of UK academic and commercial consultants in Human-Computer Interaction, providing initial contact information for prospective clients seeking experts within this field.

Constantine & Lockwood, Ltd. - Supporting usage-centered design for more usable software-based products through training, design, evaluation, and consulting services.

GUIguy - Design and usability consulting for Windows applications and web sites, for business productivity.

Humansystems Inc. - Humansystems specializes in Human Factors and Ergonomics. A consultant company involved in web site analysis, HCI, task analysis and modeling.

Ariel Performance Centered Systems, Inc. - Ariel PCS is a management consulting and software development company that has expertise with all forms of Electronic Performance Support Systems (EPSS).

Digitext - Providers of usable information solutions from online help to intranet design.

IBM ease of use. - About the total user experience.

Fonix Corporation - Develops and markets text-to-speech, speech recognition and handwriting recognition solutions to improve human-computer interaction.

Tech-bridge - Pradeep Henry's offshore user-experience driven approach to the design/evaluation of websites and products.

Autospec Thematics - Produces solutions to match individual needs and goals with resources including incomplete, fuzzy and "difficult" data.

Beta Research, Inc. - Consulting and research in human factors, ergonomics, usability and safety in product and system design.

Future Now - E-commerce consulting firm specializing in the application of traditional sales techniques, consumer psychology, information architecture, and usability engineering principles to e-business.

Frontend - Frontend provides user-centred interface solutions for online developments and software applications. Includes the Usability Infocentre and User News newsletter.

R&R Research, Inc. - New user research, product innovation, interaction design prototyping and usability evaluation for the "design of user experience".

Luke Wroblewski : Interface Designer - LukeW.com is the digital brain dump of cybertist, Luke Wroblewski.

Icon Medialab - Offers a wide range of services with a HCI bias

Creative Good - Making the Internet easier to use -- with consulting and free customer experience resources.

Jef Raskin - A site about Jef Raskin, creator of Apple's Macintosh computer project, the Canon Cat, and other inventions.

NV3D - A sophisticated data visualization toolkit for visualizing large sets of complex data.

Frontend Usability Engineering Consultants - The Frontend InfoCentre introduces principles of usability engineering and provides resources and information for usability engineering projects.

Hastings Research - Internet and Interface Development.Specialise in HCI, usability, architecture, systems integration and ebusiness.

Cooper Interaction Design - Offers a range of goal-directed services that can be used to create and improve interactive solutions.

Paul D. Hibbitts - Interaction designer Paul D. Hibbitts of Hibbitts Design provides user interface design services, including usability evaluations and education.

MacSpeech, Inc - Speech Recognition for the Mac. - Voice Recognition software, Command & Control - where to buy iListen

Flow Interactive Ltd. - Interaction Solutions - A UK based Interaction Design consultancy who will either design a solution for you, or help you to design the most user friendly one yourselves.

Alison Crerar - A senior lecturer at Napier University who undertakes occasional external HCI consultancy.

Vertical Research, Inc. - A human factors design and development compan that designs user interfaces and provides usability consulting and testing services.

Apogee Solutions - Human Performance Improvement - Evaluation and design for training and performance support.

E-netMedia Usability - Provides Interactive Web,Wireless,ITV usability testing and customer experience studies. (UK company)

European Usability Support Centres - A network of support centres across Europe to help companies enhance the usability of their products and systems

Netpoll - A consultative research company and the leading specialist in user attitudes to all digital platforms.

Siteusability.com - Providing site audits and reviews, search engine placement reports, and specialised usability services for web sites.

Userlab, Inc. - Consulting in website usability, training and testing.

Web Super Shopper - Consulting firm that provides usability testing services for websites and other software applications. (West St. Paul, MN)

MauroNewMedia - User Interface Design and Usability Engineering

Ergosoft Laboratories - Bases information architecture on user data and continuous usability testing.

Lextant - Provides user experience research, user-centered interactive design and usability evaluation.

Interactive Display map of Sault Ste. Marie, Ontario - Display map is an interactive map designed in flash for easy, clear navigation through the city of Sault Ste. Marie, Ontario on the internet.

Web Word Services - Services offered webword.

theUEgroup - Human Interface Design Consultants - Experienced consultants specializing in the area of user interface design and usability.

The Hiser Group - Committed to liberating technology from the technologists and letting people play with it instead.

HannaHodge - A "user experience" firm the is the brainchild of Challis Hodge, CEO, and Parrish Hanna, both former IBM and university professors. Based in Chicago.

Comprehensive Customer Relationship Management - Provides comprehensive Customer Relationship Management (CRM) from Project Consultancy to implementation and integration.

Usability Inspections - Inspectw your site in detail for usability problems and provide recommendations.

Usercentric Design, LLC. - Design and usability - Services include Usability Testing, Focus Groups, Web Design, Interface Design, Graphic Design, Product Design located in Bellevue, Washington

Corsair - Corsair specializes in Customer Experience - visual design, information architecture, and strategy.

AlliedTesting - An outsourcing company specialising in testing of on-line applications and web sites.

merges - An interaction and interface design consultancy.

IMAQA - Internet and Intranet Ease-of-Use - Located in Ghent (Belgium). Web architects with services focused on user experience.

Milobox, Inc - Helps clients create, renew and strengthen their UI to provide a optimal user experience.

HumanCentric Technologies, Inc. - Human Factors testing and consulting firm in Cary NC with areas of expertise in the Web, Consumer Electronics, and Ergonomics.

UserWorks, Inc. - Usability services, in-house portable usability labs, and general HCI (human computer interaction). (US - Maryland)

Sprezzatura Systems, Inc.: Design, Programming, and Documentation - Software design, programming, and documentation. White papers and other collaterals. Web site design and writing.

The Usability Group - A User Experience Consultancy whose mission is to improve the economic health and market share of clients.

Dreamstep Design - User Interface Analysis and Design.

Knabe Design - Information architecture, interaction design, technical writing, and usability evaluation.

Usability Systems, Inc. - Design of custom usability testing environments, including stationary labs and portable labs.

Human Factors International, Inc. - Ensuring usability and systems consistency through software ergonomics, human factors science and design artistry.

Siemens Usability Center - Provides expert support for software development, interface design and advanced web technologies.

Inverse Ratio, Inc - Inverse Ratio provides research, workshops, and consulting for improving the user experience of web sites and interactive applications.

HT Consulting - Provides usability assessment (such as expert reviews and user testing) of web sites, software, documentation, and computer-related hardware.

Usability Consultancy - A strategic web design consultancy which uses Marketing, User Centred Design and Market research techniques.

Interface Architecture - Interface Architecture, Inc. is a usability engineering consulting firm that provides user interface design and evaluation services.

Bulter Place. - Human Experience Development - putting people at the heart of web development.

b c bennett - Expertise creating compelling user interfaces through the integration of innovative technology, business need and aesthetic design.

Namahn - corporate website - Namahn is a Brussels-based consulting firm specializing in customer-focused information design and interaction design.

Sterling Creations - Technology for persons with special needs / access for everyone.

Diamond Bullet Design - Web site design, user interface design, and usability evaluation services.

Net Usability - Customer Experience Management (CEM) and Web site usability testing technology and services for improving the Web site experience

creatiVeracity - A Media Design Agency specializing in User Interface (UI).

ExponentMedia - User-centric strategic services, led by Cia Romano.

Interaction design - Web design & strategy

Mental Models - Mental Models employs a user-centered approach to provide User Interface consulting, rapid application prototyping, presentation and graphic design.

Busse Design USA - Experts in User Interface Design for applications and other web-based products.

Rocket Communications, Inc. - Consultants providing information architecture, interface & visual interface design, icons, and usability testing.

Interpix Design Inc. - Delivers User Interfaces

Look and Feel Australia - A new type of interactive product design company, combining usability and integrated marketing expertise to create interactive products.

EyeTracking,Inc. - EyeTracking offers more than conventional UI testing.

ART, Advanced Recognition Technologies Inc. - ART develops natural human user interface technologies, focusing on embedded voice and handwriting recognition solutions for mobile devices.

Meru Research - Dutch provider of interaction design and user experience research services.

Usability Architects, Inc. - A usability consulting and contracting firm specializing in designing the user experience with user-centered methodologies.

Fission Interactive Inc. - A team of designers, programmers and usability specialists released into the market from Nortel Networks' former human factors group, Design Interpretive.

David Stubbs - Consultation, training, and down-in-the-trenches work with user-centered methods.

Classic System Solutions - A software development and professional services organization with expertise in graphical user interface (GUI) design and usability.

GUIguide - An Interface Design Knowledge Portal primed with Web/Client-server design standards, case studies, templates, and more.

datapanik - Provides user interface design, user centered design, and usability services for software and hardware developers.