Interaction Architect
Sim D'Hertefelt offers services for designing usable interactive systems, includes articles. Located in Belgium.
Interaction Design
Offers Web design and usability testing services.
Interface Consult
Offers web design services and features usability testing facilities. Located in Austria.
Interface Guru
Tests and makes recommendations on how to improve commercial websites. Located in Tucson, Arizona, USA.
Interpix Design Inc.
Consulting firm with focus on simplicity and usability. Located in Canada.
Jeff Brace Design
Consulting services include business analysis, information architecture, user interface design, and usability evaluations. Located in British Columbia, Canada.
Joe 10 Group
Interface design and usability consulting firm which applies user centered design strategies to help businesses improve the user experience of their Web sites and consumer products. Located in California, USA.
KeyLabs Software Testing Products and Services
KeyLabs is an independent testing lab providing web site application performance testing.
Knabe Design
Information architecture, interaction design, technical writing, user centered design, and usability evaluation. Located in Pennsylvania, USA.
Kraka Inc.
Offering consulting services in most aspects of interaction design. Located in California, USA.
Lextant
Provides user experience research, user-centered interactive design and usability evaluation. Offices in Ohio and Colorado, USA.
Look and Feel Australia
Offers user experience design plus usability and product strategy consulting. Also other services concerning interactive products.
LukeW Interface Designs
Specializes in the visual, interface, and interaction design of web-based applications and identities. Located in Illinois, USA.
Maskery
Offers user centred research and design services, specializing in concept design, usability, accessibility product evaluations, and training. Located in Ottawa, Canada.
MauroNewMedia
Consulting services concerning User Interface Design and Usability Engineering. Located in New York, USA.
McGee, Patrick W.
User interface designer and illustrator for online and offline media in Texas, USA.
Meleniak
Offering usability evaluation, accessibility advice, and web design. Located in the United Kingdom.
Membex
Specializing in interface design, usability testing, site development, database architecture, and ecommerce sites. Located in Pennsylvania, USA.
Mental Models
Employs a user-centered approach to provide User Interaction consulting, rapid prototyping, presentation and graphic design. Focus on enterprise applications. Located in California, USA.
Meruteam
Provides usability and user interface design services to companies targeting their applications at European users. Based in the Netherlands.
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