HMC Interactive
- Develop interactive multimedia for a wide range of industries from education to entertainment. Located in Plymouth, England, United Kingdom.
- http://www.hmcinteractive.co.uk/

Hiya Multimedia
- Services cover CD authoring, duplication and replication, web design, Flash, video production, multimedia presentations, and print design. Located in Andheri, Mumbai, India.
- http://www.hiyamultimedia.com/

HyperActive Multimedia
- Services include 2D/3D animation, hosting, illustration, interactive authoring, presentation, print design, programming, videography, and web design. Located in Boston, Massachusetts, United States.
- http://www.hyperactive.to/

Headsreach
- Services include CD authoring, web design, database integration, 2D/3D graphics creation, Flash animation, video editing and post production, and print design.
- http://www.headsreach.com/

Horizon Productions
- Services include video production, CD/DVD authoring, web design, print design, and event staging. Located in Cincinnati, Ohio, United States.
- http://www.horizon-productions.com/

Hard n Soft Technologies
- CD authoring, web design, 2D/3D animation, and print design. Based in Chennai, India.
- http://www.hnsonline.com/

Horizons Companies
- Providers of website design, multimedia authoring and video, film and sound design.
- http://www.horizonscompanies.com/

Heritage Multimedia
- Specializing in heritage, leisure and culture projects.
- http://www.heritage-multimedia.co.uk/

Houdini
- Creators of websites, CDs, DVDs, broadband productions.
- http://www.houdini.se/

Hildebrand Interactive
- Providing Internet, TV and digital media solutions.
- http://www.hildebrandinteractive.com/

Hand Multimedia
- Developers of self-maintained multimedia software, interactive websites, screen savers and promotional games.
- http://www.hand-multimedia.co.nz/

Hunt and Gather
- Web and CD-ROM development agency focusing on the computer medium.
- http://www.huntandgather.com/

Harbour Light Productions
- Multimedia design and programming. Solutions for web, multimedia and print design needs.
- http://www.harbourlight.com/

High Ground Digital, LLC
- Specializing in interactive multimedia, corporate presentations, kiosks, and web site production.
- http://www.hgdigital.com/