A web usability and solutions consultancy, offering user-centered ergonomic design and web development. Located in the UK.

Provides consulting, research, and training in usability evaluation and interaction design. Located in Ohio, USA.

Research and IT consulting expertise in the assessment of information systems for: ERP, CRM, CMS, DBMS. Located in Colorado, USA.

Specialized in user-centered design, prototyping, support of the development process, and iterative test and refine of the final product. Includes articles by Jim Miller. Located in California, USA.

Offering usability evaluation, accessibility advice, and web design. Located in the United Kingdom.

User interface designer and illustrator for online and offline media in Texas, USA.

Consulting services concerning User Interface Design and Usability Engineering. Located in New York, USA.

Offers user centred research and design services, specializing in concept design, usability, accessibility product evaluations, and training. Based in Canada.

Specializes in the visual, interface, and interaction design of web-based applications and identities. Located in Illinois, USA.

Offers user experience design plus usability and product strategy consulting. Also other services concerning interactive products.