Daup
Offers positioning and marketing services. Located in Borgosesia, Italy.

Deadlock Design
Creates meta tags and titles for designated pages, promotes them on search engines. Monthly maintenance and upkeep.

Decide Interactive - Australia
Internet promotion and affiliate marketing services.

Denmax Web
Providing search engine placement and web site optimizing. Located in Denver, Colorado.

Design Corner
Web design firm offering website optimizing, and hosting services.

Did-It.Com
Offers submission services and optimization by keywords client selects.

Digital Age Marketing LLC
Provides search engine placement and marketing.

Digitel Traffic
Offers search engine positioning and Internet marketing services for midsize to Fortune 500 companies.

Direct Hits
Website promotion and ranking services, customized keyword and keyphrase development and search engine submissions and positioning.

Disc Web Marketing
Offers website design, optimization, and other forms of promotion.

DiTucci
Professional optimization and website promotion, offers a free search engine report.

Diverse Internet Solutions
Edmond, Oklahoma-based. Provides website optimization and submittal, as well as web design and hosting, services.

DIY-SEO
Ireland-based firm offers search engine optimisation services including keyword research, tag coding, and link-building. From the compilers of the DIY guide.

DM Consulting
Canadian firm offers website optimizing services.

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