Specializes in Human Factors and Applied Ergonomics. A consultant company involved in web site analysis, HCI, task analysis and modeling. Located in Canada.

Specializes in applying human factors analysis to usability engineering, testing, and interface design. Located in Washington.

Offering user experience research services and consultation in usability for the products of the digital world, especially wireless ones. Located in Finland.

Specializes in site and user interface development, web consulting, and training.

Provides design, training, and market information services. Located in Massachusetts, USA.

Offers usability consulting. Includes resources, articles and courses. Located in Melbourne, Australia.

Offers services to study user behaviour and apply results to create functional and usable user interfaces. Located in the UK.

Specializes in goal-based user interface design and field studies to find out the users' goals. Provides usability assessment, e.g. expert reviews and usability testing. Located in Finland.

Sim D'Hertefelt offers services for designing usable interactive systems, includes articles. Located in Belgium.

Offers Web design and usability testing services.