ONWebguide.com
- A directory of Ontario business and community links.
- http://www.fullerworks.com/link/

Cities and Towns
- Communities portal providing links to shopping, dining, real estate, services and attractions. Includes details of hosting and advertising offers, also contact information.
- http://www.citiesandtowns.ca/

Canada Ontario Business Service Centre (COBSC)
- A gateway to federal and provincial programs, regulations and services for business.
- http://www.cobsc.org/

The Ontario Business Directory
- A free online directory for all businesses located in Ontario.
- http://www.aroundont.com/

Mr. Bob's Small Business Network
- Searchable directory of Ontario small businesses with expert advice, articles and small business planning and marketing tools.
- http://mrbob.ca/

TalaashPages
- Categorized listings of south Asian businesses and services in southern Ontario.
- http://www.talaashpages.ca/

Northernpathfinder.ca
- A directory of websites for communities in northern Ontario.
- http://www.northernpathfinder.ca/

In Ontario
- Reviews a selection of Ontario-based businesses in different sectors, with a feature on a different business every month.
- http://www.inontario.ca/

Flyermall.com
- A directory listing of advertising by major retailers in Ontario, and of businesses by classification.
- http://www.flyermall.com/

BioOntario
- Biotech portal and Business to Business Marketplace, with information on provincial therapeutic and agricultural biotechnology. Includes RFQ and IP marketplaces, jobs, research news, trade events and company profiles.
- http://www.bioontario.ca/

Ontario Small Business Directory
- Directory offering free listings to businesses. Includes advertising rate information.
- http://www.on-biz.ca/

Ontario Cities
- A listing of businesses broken down by city across Ontario.
- http://www.ontariocities.com

Ontario Environment Business Directory
- Searchable directory of Ontario environmental organizations and businesses.
- http://www.envirodirectory.on.ca/