Free business listing provides us best inbound links and google gets much more search than any other search engine. Here are lot of listing site on the web allow to ad free links to their websites.
http://www.zygella.com/
http://www.salespider.com/
http://canadianbusinessdirectory.co/
http://www.linksite.ca/
http://www.manta.com/
http://www.brownbook.net/
http://directory.ac/
http://www.expressbusinessdirectory.com/
http://www.businesslinedirectory.com/
http://greenbizbook.com/
http://www.ourbis.ca/
http://smallbizpages.ca/
http://www.mysheriff.ca/
http://www.fxdirectory.ca/
http://www.vendorland.ca/
http://www.bizvineca.com/
http://www.fyple.ca/
http://www.spoke.com/
http://ylm.ca/
http://www.profilecanada.com/
http://hotfrog.ca/
http://www.sourcetool.com/
http://www.york.ca/
http://www.ottawafreebee.com/
http://dakitaki.com/
http://bluepage.ca/
http://yalwa.ca/
http://listingsca.com/
http://buyitcanada.com/
http://www.canadaone.com/
http://411.ca/
http://www.yelp.ca/
http://skyrock.com/
http://businessmention.ca/
http://www.mysheriff.net/
http://yoklelist.com/
http://list-company.com/
http://www.totalblogdirectory.com/
http://www.myperth.com/
http://www.gosearchfor.com/
http://www.kellysearch.com/
http://www.showsmart.com/
http://www.uscounties.com/
http://california.bizhwy.com/
http://www.kudzu.com/
http://www.businessdirectory4u.com/
http://www.coastalbc.com/
http://www.bccontacts.net/
http://listings.expressupdateusa.com/
http://www.judysbook.com/
http://www.yellowassistance.com/
http://www.infignos.com/
http://www.yext.com/
http://www.yellowee.com/
http://www.matchpoint.com/
http://www.cityslick.net/
http://www.supermedia.com/
http://www.welovelocal.com/
http://www.mojopages.com/
http://www.jayde.com/
http://andysdirectory.com/
http://bestdirectory.com/
http://www.ibegin.com/
http://www.gomylocal.com/
http://www.yellowbook.com/
http://www.superpages.com/
http://www.yellowbot.com/
http://www.ziplocal.com/
http://local.yahoo.com/
http://www.whitepages.com/
http://www.hotfrog.com/
http://yellowpages.aol.com/
http://www.yellowpages.com/
http://www.switchboard.com/
http://www.insiderpages.com/
http://business.intuit.com/
http://citysearch.com/
http://www.city-data.com/
http://www.touchlocal.com/
http://www.localtom.co/
http://upspring.com/
http://www.finduslocal.com/
http://www.thinklocal.com/
http://www.justclicklocal.com/
http://www.homeownerscircle.com/
http://wooeb.com/
http://one4all.co.in/
http://yp.ocregister.com/
http://www.hometoys.com/
http://www.merchantcircle.com/
http://thewestisland.ca/
http://www.shopincanada.com/
http://www.cdnpages.ca/
http://www.canadianbusinessdirectory.ca/
http://www.freebizads.ca/
http://www.localsites.ca/
http://www.canadawebdir.com/
http://www.mydotca.ca/
http://www.ctidirectory.com/
http://www.on-biz.ca/
http://www.ultimatetoronto.com/
http://business.totalblogdirectory.com/
http://www.canadiandirectory.org/
http://www.ebiznext.ca/
http://www.tuugo.ca/
http://www.aroundont.com/
http://www.laptoprepair.ca/
http://www.magicyellow.com/
http://www.joyah.ca/
http://www.swansea.ca/
http://directory.bdcbusinessconnect.com/
http://bistraining.n49.ca/
http://dexknows.com/
http://decidio.com/
http://www.cylex.ca/
http://www.trycanada.com/
http://canlookup.com/
http://www.merchantscorner.ca/
http://www.azypages.com/
http://www.businessdir.ca/
http://www.1800canada.ca/
http://www.goldbook.ca/
http://www.localurl.ca/
http://zipleaf.com/
http://www.phonepages.ca/
http://www.adlocal.ca/
http://www.localbee.ca/
http://www.eco.ca/
http://my.citysquares.com
http://myhuckleberry.com
http://www.discoverourtown.com/
http://twibs.com
http://local.com
http://www.showmelocal.com/
http://tupalo.com/
http://www.b2byellowpages.com/
http://www.elocal.com/
http://ezlocal.com/
http://www.seekitlocal.com
http://www.yellowpagecity.com/
http://www.canpages.ca/
http://www.mywebyellow.com/
http://www.yellowusa.com/
http://www.yell.com/