Seed
- Advertising and Design agency based in London, offers information on services, portfolio and contact.
- http://www.seedfx.com

SGW Creative
- Seattle based agency with details of advertising services, portfolio, and client list.
- http://www.sgwcreative.com

Stephan & Brady
- Site offers company overview, client list and advertising portfolio, flash plugin is required.
- http://www.stephanbrady.com/

Sheer Associates, Inc.
- Chapel Hill, NC. based agency helping organizations communicate their marketing message through graphic design, strategic planning, advertising and direct marketing.
- http://www.sheermarketing.com/

Smith Kaplan Allen & Reynolds Advertising
- Full service advertising and public relations agency.
- http://www.skar.com

Stafford Creative, Inc.
- A full service advertising agency and graphic design firm located in Seattle, WA.
- http://www.staffordcreative.com/

Sonar Productions, Inc.
- A full-service advertising agency, production company and interactive firm developing broadcast, online and print media products. Specialized in marketing hip products and targeting youth markets.
- http://www.sonarproductions.com

Stone & Simons Advertising, Inc.
- Michigan based full service advertising agency.
- http://www.stonesimons.com/

Slingshot LLC
- A full service agency that plans, develops and executes online and off-line marketing and advertising projects.
- http://www.davidandgoliath.com/

Studio 2 Marketing/Advertising
- A full service agency offering marketing, advertising, graphic design and web site development.
- http://www.studio-2.com/

Stain NYC
- Marketing, advertising and creative consulting.
- http://www.stainnyc.com/

Streicker & Company
- Rhode Island ad agency specializing in industrial advertising, marketing and public relations.
- http://www.streicker.com/

Sans Frontiere
- Full service creative advertising and design agency.
- http://www.sansfrontiere.co.uk

The Stratton Group
- Specializing in advertising, marketing, web design, print and trade shows.
- http://thestrattongroup.com/

Sushma Multimedia
- A full service advertising agency based in Chennai, India.
- http://sushmamm.com

Stevens and Stevens LLC
- Marketing communications services for associations.
- http://www.st-st.com

Steven I. Gusenoff Company
- Logos, brochures, advertising and marketing.
- http://www.gusenoff.com/

Stern Agency
- Full service agency.
- http://www.sternagency.com/

Stephen Hales Creative
- Marketing communications solutions that dissipate your promotional worries.
- http://www.halescreative.com/

SRT Advertising
- Full service national advertising agency in Croatia.
- http://www.srt-advertising.com/

Square One Advertising
- A full service advertising agency that provides our clients with cutting edge, integrated marketing solutions.
- http://www.sq1inc.com/

Sperry and Associates
- A full service marketing and communications agency.
- http://www.sperry.org/

Sonnhalter Advertising and Marketing
- A full service, business-to-business advertising agency and web development firm.
- http://www.sonnhalter.com/

Smith Lamar and Associates
- Full service advertising agency.
- http://www.smithlamar.com/

Souza Agency
- Integrated marketing communications agency specializing in advertising campaigns, graphic design, interactive multimedia, web design, print collaterals and branding. Annapolis, MD.
- http://www.souza.com/

Slack Barshinger and Partners
- Integrated marketing communications agency specializing in business to business.
- http://www.slackbarshinger.com/

Shannon David Design
- Full service advertising agency.
- http://www.shannondavid.com/

Sid Paterson Advertising
- Offering clients a complete range of advertising disciplines and marketing programs, fully integrated under a single strategy.
- http://www.spadvertising.com/

Senioragency
- European marketing firm dedicated to mature consumers (over 50) and aging baby boomers; includes details on services, vision statement, and an office directory.
- http://www.senioragency.com/

Sigma Advertising
- Advertising agency that packs a New York punch. Full print and multimedia capabilities.
- http://www.sigmaadvertising.com/

Scott Simmons and Associates
- Advertising agency specializing in graphic design.
- http://www.scottsimmons.com/