3D Technology  
   Partnering with small businesses to provide IT support services. Offering full service IT solutions and consultancy, network design, installation, and management.
   http://www.3dtech.net

3rd Millennia Consulting  
   Offers strategic planning and marketing consulting to high technology companies.
   http://www.3rdmillenniaconsulting.com

3rd Wave  
   Technology consulting company offering IT tech support for advertising and creative communications companies.
   http://www.3rd-wave.net

360 Systems  
   A provider of computer consulting and technical services to the small- and medium-sized enterprise market in the Greater Toronto Area.
   http://www.360systems.ca

3T Pro Inc.  
   Technology consulting firm focusing on large scale systems for small and medium sized businesses.
   http://www.3tpro.com

512Interactive  
   Offers a wide range of IT consulting services including computer manufacturing, website design, e-commerce solutions, backend database architecture, and legacy system integration.
   http://www.512interactive.com

3Track Solutions Limited  
   IT consulting, systems integration and software development firm.
   http://www.3track.co.uk/