Here is a list of numbers for Canadian long distance carriers. Dial one of these numbers followed by 1(area code)+number. Some are for overseas and some are North America only. I use 1015945 from Yak Communications on a regular basis. I believe it's 5 cents a minute.

1010100 The Friend Network Services Inc. Toronto, Ontario, CANADA
1010119 Northern Telephone Ltd. New Liskeard, Ontario, CANADA
1010138 Metcom Canada Limited Markham, Ontario, CANADA
1010180 Elite Communications Inc. Toronto, Ontario, CANADA
1010195 Starcom International Optics Corp. Vancouver, BC, CANADA
1010199 4053605 Canada Inc. Burlington, Ontario, CANADA
1010215 Pronto Long Distance Inc. Westmont, Quebec, CANADA
1010219 3588599 Canada Inc. dba Sun Telecom Group Montreal, Quebec, CANADA
1010230 3855651 Canada Inc. Sainte-Marie De Beauce, Quebec, CANADA
1010242 Sasktel Ottawa, Ontario, CANADA
1010320 3855651 Canada Inc. Sainte-Marie De Beauce, Quebec, CANADA
1010323 BC Tel Burnaby, BC, CANADA
1010324 TELUS Communications (Edmonton) Inc. (TCE) Ottawa, Ontario CANADA
1010348 Sprint Canada, Inc. North York, Ontario CAN
1010357 4053605 Canada Inc. Burlington, Ontario CANADA
1010363 Bell Canada London, Ontario CANADA
1010415 Execulink Burgessville, Ontario CANADA
1010422 Island Tel, PEI Ottawa, Ontario CANADA
1010424 Telus Communications Inc. Burnaby, British Columbia CANADA
1010434 Maritime Tel & Tel Ottawa, Ontario CANADA
1010445 NewTel Communications Ottawa CANADA
1010448 NB Tel Saint John New Brunswick CANADA
1010580 Onlinetel Corp. Kitchener, Ontario CANADA
1010615 PRIMUS Telecommunications Canada Vancouver, British Columbia CANADA
1010620 Telehop Communications Inc. Toronto, Ontario CANADA
1010686 AT&T Canada Long Distance Services Co. Toronto, Ontario CAN
1010710 3855651 Canada Inc. Sainte-Marie De Beauce, Quebec CANADA
1010773 Sprint Canada, Inc. North York, Ontario CAN
1010783 MTS Communications Inc. Ottawa, Ontario CAN
1010809 Asia International Services Corp. (AIC) Burnaby, British Columbia CAN
1010816 Consolidated Technologies, Inc (CTI) Vancouver, British Columbia CAN
1010844 Brooke Telecom Co-operative Ltd. Inwood, Ontario CANADA
1010858 AT&T Canada Long Distance Services Co. Toronto, Ontario CAN
1010869 AT&T Canada Long Distance Services Co. Toronto, Ontario CAN
1010920 Cyberlink Pacific Telecommunications Limited Vancouver, BC, CANADA
1010956 City Telecom Inc. (CITI) Scarborough, Ontario, CANADA
1010960 London Telecom Hamilton, Ontario, CANADA
1010978 RSL COM Canada, Inc. North Vancouver, BC, CANADA
1010980 Onlinetel Corp. Kitchener, Ontario CANADA
1010990 I Don't Care Inc. Toronto, Ontario CANADA
1011010 Bruce Municipal Telephone System Tiverton, Ontario CANADA
1011035 Convergia Network, Inc. Pointe-Claire, Quebec CANADA
1011273 Westport Telephony Company Limited Westport, Ontario CANADA
1011582 North Renfrew Telephone Company Limited Beachburg, Ontario CANADA
1014321 Cyberlink Pacific Telecommunications Limited Vancouver, BC, CANADA
1014835 Huron Telecommunications Co-Operative Limited Ripley, Ontario CANADA
1015055 Gateway Telephone Limited North Bay, Ontario CANADA
1015066 MetroNet Communications Group Inc. Calgary, Alberta CANADA
1015128 Call For Less Oshawa, Ontario CANADA
1015151 ExaTEL Inc. Sudbury, Ontario CANADA
1015161 Telecom Quebec Inc. Bon Consell, Quebec CANADA
1015226 BC Tel Burnaby, BC CANADA
1015236 Roxborough Telephone Company Limited Moose Creek, Ontario CANADA
1015240 Bell Canada London, Ontario CANADA
1015322 BC Tel Burnaby, BC CANADA
1015350 Yak Communications (Canada) Inc. Scarborough, Ontario CANADA
1015355 Yak Communications (Canada) Inc. Scarborough, Ontario CANADA
1015363 Bell Canada London, Ontario CANADA
1015398 CanopCo Incorporated Toronto, Ontario CANADA
1015430 Bell Canada London, Ontario CANADA
1015431 Telus Communications Inc. Burnaby, British Columbia CANADA
1015489 Cogeco Cable Canada Inc. Montreal, Quebec CANADA
1015497 Tuckersmith Communications Co-operative Limited Kippen, Ontario CANADA
1015505 C.1.com Inc. Saint John, New Brunswick CANADA
1015565 Yak Communications (Canada) Inc. Scarborough, Ontario CANADA
1015566 Sprint Canada, Inc. North York, Ontario CAN
1015742 Hay Communications Co-operative Limited Zurich, Ontario CANADA
1015748 Amtelecom Communications Aylmer, Ontario CANADA
1015762 Lansdowne Rural Telephone Company Lansdowne, Ontario CANADA
1015793 Bell West Inc. Edmonton, Alberta CANADA
1015804 Phonetime International Mississauga, Ontario CANADA
1015826 Vancouver Telephone Company Ltd. Vancouver, B.C. CANADA
1015843 Triton Hospitality Communications Inc. Calgary, Alberta CANADA
1015945 Yak Communications (Canada) Inc. Scarborough, Ontario CANADA
1015967 Island Tel, PEI Ottawa, Ontario CANADA
1015972 Sprint Canada, Inc. North York, Ontario CAN
1015989 Wightman Telecom Ltd. Clifford, Ontario CANADA
1016002 Microcell Connexions Inc. Toronto, Ontario CANADA
1016022 Cannect Communications Inc. Vancouver, British Columbia CANADA
1016038 ASP Wireless Net Inc. Mississauga, Ontario CANADA
1016122 Optel Communications Corp. Toronto, Ontario CANADA
1016148 GT Group Telecom Services Corp. Vancouver, British Columbia CANADA
1016173 Telebec Ltd. Anjou, Quebec Canada
1016242 Sasktel Ottawa, Ontario CANADA
1016265 Telephone Milot Mobilite Inc. St-Paulin, Quebec CANADA
1016274 Bell Canada London, Ontario CANADA
1016283 NewTel Communications Ottawa CANADA
1016305 DACo Telecommunications Inc. Winnipeg, Manitoba CANADA
1016318 Bzaat Communications Town of Mount Royal, Quebec CANADA
1016321 Pacifictel Communications, Inc. Ajax, Ontario CANADA
1016336 Touchtone Communications 2000 Ltd. Vancouver, BC CANADA
1016353 NewTel Communications Ottawa CANADA
1016385 North Frontenac Telephone Corporation Ltd. Baden, Ontario CANADA
1016394 Nexicom Telecommunications Inc. Millbrook, Ontario CANADA
1016395 Nexicom Telephones Inc. Millbrook, Ontario CANADA
1016434 Maritime Tel & Tel Ottawa, Ontario CANADA
1016448 NB Tel Saint John New Brunswick CAN
1016449 NB Tel Saint John New Brunswick CAN
1016505 Telus Communications (Quebec) Inc. Rimouski, Quebec CANADA
1016510 Telus Communications (Quebec) Inc. Rimouski, Quebec CANADA
1016550 Telus Communications (Quebec) Inc. Rimouski, Quebec CANADA
1016616 Gosfield North Communications Co-op Ltd. Cottam, Ontario CANADA
1016650 O.N.Tel North Bay, Ontario CANADA
1016652 Borg Telecommunications Inc. Toronto, Ontario CANADA
1016653 O.N.Tel North Bay, Ontario CANADA
1016674 Managed Network Systems Inc. Windsor, Ontario CANADA
1016765 Mornington Communications Co-operative Ltd. Milverton, Ontario CANADA
1016775 Navigata Communications Inc. North Vancouver, British Columbia CANADA
1016793 Libotel Inc. St. Liboire, Quebec CANADA
1016833 9107-1365 Quebec Inc. Valcourt, Quebec CANADA
1016836 MCSC ACCESS IN CANADA (CSCN) Edmonton, Alberta CANADA
1016867 Northwestel, Inc. Whitehorse, Yukon CANADA
1016885 Videotron Telecom Ltee. Montreal, Quebec Canada
1016995 People's Telephone Company of Forest Inc. Province, Ontario CANADA
1017643 Interurbain Sogetel Inc. Nicolet, Quebec CANADA
1018229 Thunder Bay Telephone Thunder Bay, Ontario Canada
1018888 Gateway Networks Ltd. North Bay, Ontario CANADA