Google offers dozens of country-specific search engines; here are the ones for francophone countries. Note that for multilingual countries, you may need to click "français" under the search box to go to the French interface:
Bing does not provide country-specific search engines, but you can limit your search to pages from a certain country and/or written in a certain language. To do this, go to www.bing.com, perform your search, click "Advanced," and then choose a language and/or country.
Yahoo has a few country-specific search
engines, notably Yahoo France and
Yahoo Canada. For other countries,
you need to go to www.yahoo.com, click "more >
advanced search," and then either go to the "site/domain" field
and type the two-letter country code,
or click the "country" drop-down box and make your selection.