Building backlinks is the priority on all webmasters to do list. More the backlink your site have, more important your site is in the eyes of search engines(if they have any). Recently Google started cracking down paid link inclusions. But you can submit to these free Non-Paid directories and build your valuable backlinks.
Here is a small list of FREE directories. Some of these may not be free anymore. I couldn't check all of them.
http://www.121answers.com/directory http://www.01webdirectory.com http://www.0go.net/Submit-directory-link.html http://www.101-seo-resources.com/ http://www.10directory.com/ http://www.123kidzarea.com http://www.123listfree.com/ http://www.1abc.org/ http://www.1any.com http://www.1forall.88ck.com/ http://www.1stchoicesearch.com/ http://www.1stw.com/ http://www.22d.org/dir/ http://www.2addlink.info/ http://www.2space.net http://www.2-surf.net http://www.2yi.net http://www.4-every-1.ws http://www.4ppl.com/directory http://www.707directory.com/ http://www.71k.net/ http://www.777media.com http://www.9pr.org/ http://www.9ug.com/ http://www.a1directorysearch.com http://www.a1searchdirectory.com/ http://www.aaadir.info/ http://www.aaawebdirectory.com http://www.abacusdirectory.com/ http://www.abarcy.co.uk/ http://www.abifind.com http://www.abigdir.com/ http://www.abilogic.com http://www.abireal.com/ http://www.abizdirectory.com http://www.aboharwatch.com/dir/ http://www.abotdirectory.com/ http://www.about.co.za/ http://www.absolutedirectory.com http://www.abydir.com/ http://www.accessweb.ws http://www.a-dating.net/ http://www.add2dir.info/ http://www.addasite.info/ http://www.adddir.info/ http://www.add-link.info http://www.addnfind.com/ http://www.addsite-submitfree.com http://www.addurl-free.com http://www.addyourlinkfree.com http://www.adsimple.net/ http://www.a-free-directory.info http://www.africaoildirectory.com/ http://www.a-full-directory.com/ http://www.agilelist.com/ http://www.aigam.com http://www.a-law.org/ http://www.alistdirectory.com/ http://www.alistsites.com/ http://www.allbusinessdirectory.biz/ http://www.alldirectlinks.com/ http://www.alldotweb.com/ http://www.allfreethings.com http://www.allshort.com/ http://www.allthelist.com/ http://www.alltheurl.com/ http://www.allthewebsites.org http://www.allurls.info/ http://www.allwebplaces.com http://www.allwebspiders.com http://www.alternative-health-directory.net/ http://www.alvz.com/ http://www.american-dating-guide.com http://www.americasbest.com http://www.amray.com http://www.anaximanderdirectory.com/ http://www.animalpetsandfriends.com/dir/ http://www.another-directory.com/ http://www.anotherwebdirectory.com http://www.apexoo.com/directory http://www.apexurl.com http://www.apnadir.com/ http://www.apples2apple.com/directory http://www.arakne-links.com http://www.armitagegaming.com/ http://www.artoolinks.com/ http://www.artweblinks.com/ http://www.ask-dir.com/ http://www.astanda.com/ http://www.atlastraveldirectory.com/ http://www.aussie.com.au/ http://www.australian-dating-guide.com/ http://www.austrosearch.at/ http://www.autostop4u.com/ http://www.autumntree.info http://www.avissoft.net/ http://www.avivadirectory.com/strongest-directories/ http://www.a-web-directory.info http://www.awesomedirectory.com http://www.axelis.com http://www.ayhu.com/ http://www.az.ezilon.com/ http://www.az-links.info/ http://www.azlisted.com/ http://www.b2rhosting.com/phpld/ http://www.badea.biz http://www.beedirectory.com/ http://www.bestdots.info/ http://www.bestlinkguide.com/ http://www.best-net-sites.com/ http://www.bestpetdirectory.com/ http://www.bestsitedirectory.com http://www.best-sites.co.uk/ http://www.bestsportsdirectory.com/ http://www.besttravelindex.com/ http://www.best-websites.net http://www.bhanvad.com http://www.birders.co.za http://www.bitwide.com/ http://www.bizmean.com/ http://www.bizoola.com http://www.bizsearch.co.nz/ http://www.bizzopolis.com/ http://www.blackdhalia.com/ http://www.blackdir.info/ http://www.blaxy.com/ http://www.blisswolff.com/directory http://www.bloatedyak.com/ http://www.bloggerhq.net/ http://www.bloggersdir.com/ http://www.blogio.net/ http://www.bloglisting.net/ http://www.blognblogs.com/ http://www.blue.daffodil.uk.com http://www.blue-directory.info/ http://www.bluedirectory.org/ http://www.bluemushrooms.com/sites/ http://www.bluenoser-forum.com http://www.bluenoserlinks.com http://www.blue-widget.com/ http://www.bratseek.com/ http://www.brightlightdarkroom.com/ http://www.bubl.ac.uk/ http://www.business-directory-northeast.co.uk/ http://www.businessdirectoryofusa.com http://www.businessesonly.com/ http://www.business-listing.com http://www.businessplexus.com http://www.businessseek.biz http://www.businesswebdirectory.biz/ http://www.buzznick.com http://www.c2000.com/links http://www.cachedirectory.com http://www.campingparksbeach.org/ http://www.canadaone.com/ http://www.canadian-directory.com http://www.canadianinsurancebroker.com/ http://www.canlinks.ca/ http://www.canlinks.net http://www.cash-for-surveys.com/dir http://www.celebism.com/ http://www.cell-search.com/ http://www.cheapdirectory.net/ http://www.checkhouston.com/ http://www.cherrydir.com http://www.chillycool.com/dig/ http://www.chinalinking.com/ http://www.clarib.com http://www.clasione.com/ http://www.cleverlinks.net http://www.clickey.com http://www.clickfire.com/directory/ http://www.clickityhits.com/ http://www.clickmybrick.com/ http://www.clickthese.com http://www.clothes-junkie.com/ http://www.clothingwebdirectory.com http://www.club509.com http://www.cocovida.co.uk/links/ http://www.codot.net/ http://www.commercedir.com http://www.commerce-directory.co.uk http://www.comoestamos.com http://www.completeonlinedirectory.com http://www.computer-remote-control.com/directory/ http://www.consoleindex.com/ http://www.content-directory.co.uk http://www.corporatelistings.net http://www.craftsitedirectory.com/ http://www.craftytips.com/ http://www.crawlr.net/ http://www.crazyfunarcade.com http://www.creditandmortgageindex.com http://www.crystalwebhost.com/ http://www.cyberbilt.com/ http://www.cyber-find.net http://www.cyberlinkdirectory.com http://www.cyborginfo.com http://www.cyngoseek.com http://www.d911.net/ http://www.daredirectory.info http://www.ddir.org/ http://www.ddsx.com/ http://www.deep-directory.com http://www.deeperlinks.com http://www.deeplink.us/ http://www.deeplylinked.com/ http://www.design-agencies.com/ http://www.desilinkdirectory.com/ http://www.devmagic.com/ http://www.dhundo.com http://www.dietdirectory.org http://www.diggeek.com/directory/ http://www.digitalartsource.com/ http://www.digitaldir.eu/ http://www.dipslay.com/catalog/ http://www.dir.aciesinteractive.com http://www.dir.evolt.org/ http://www.dir.globetourism.biz/ http://www.dir.holidaysoup.com/ http://www.dir.info/ http://www.dir.mobi http://www.dir.mymaldives.com/ http://www.dir.profseo.com/ http://www.dir.rankalert.net/ http://www.dir.seo7.net http://www.dir.seomarketer.net/ http://www.dir.shopumust.com/ http://www.dir23.com/ http://www.dir2u.com http://www.dir2u.com/phpld/ http://www.dir6.com/ http://www.dirdir.info http://www.directastic.com/ http://www.directhoo.com/ http://www.directorio.compartimos.net/ http://www.directorio.pixelin.org/ http://www.directoriobus.com/browse-english-7729-1.html http://www.directory.americaninsurancebroker.com/ http://www.directory.biz-giant.com/ http://www.directory.carlsguides.com/ http://www.directory.cipinet.com http://www.direct-o-ry.com http://www.directory.com.au/ http://www.directory.datenautobahnraststaette.de/ http://www.directory.ezweb-tools.com/ http://www.directory.getbeautytips.com/ http://www.directory.google.com http://www.directory.helpedia.com/ http://www.directory.inetzeal.com http://www.directory.inmeres.com http://www.directory.iollo.com http://www.directory.iserv.com.au http://www.directory.jbw-uk.co.uk/ http://www.directory.ldmstudio.com http://www.directory.lonelyway.com/ http://www.directory.mydignet.com/ http://www.directory.nawigator.biz http://www.directory.niatradingsignals.com/ http://www.directory.pkdesign.sk/ http://www.directory.portalit.net http://www.directory.proud-collector.com/ http://www.directory.seoagency.info/ http://www.directory.seohyd.com/ http://www.directory.seo-poland.com/ http://www.directory.sharedhost.ch/ http://www.directory.softgroups.com/ http://www.directory.trout.pl/ http://www.directory.white.ltd.pl/ http://www.directory.wineography.com/ http://www.directory.wiredawg.net/ http://www.directory.wmnetwork.co.uk/ http://www.directory.yourimaginations.com/directory/ http://www.directory143.com/ http://www.directory4u.info/ http://www.directory4u.net/ http://www.directorybin.com/ http://www.directorycafe.com http://www.directorydelux.com http://www.directoryforce.com http://www.directoryforyou.com/ http://www.directory-france.com/ http://www.directory-free.com/ http://www.directorygeneral.com http://www.directory-global.com/ http://www.directorygold.com http://www.directoryhi.com http://www.directoryhub.org/ http://www.directorylane.com/ http://www.directory-link.info http://www.directory-links.net/ http://www.directorymember.net http://www.directorynetwork.us/ http://www.directorynew.com http://www.directoryon.info/ http://www.directoryrating.com/ http://www.directorysquare.com http://www.directorystorm.com http://www.directory-submission.net/dir/ http://www.directory-travel.com/ http://www.directorytycoon.com/ http://www.directoryvault.com http://www.directoryvista.com/ http://www.directoryworldonline.com http://www.directoryws.com/ http://www.directswift.com/ http://www.dirone.com http://www.dirpros.com http://www.dirsonline.com/ http://www.dirspace.com http://www.dir-submission.com http://www.dirsurch.com/ http://www.dirworldonline.com/ http://www.discoverdirectory.com/ http://www.disneydirectory.net/ http://www.diyrevolution.org/ http://www.dmole.org/ http://www.dmoz.org http://www.dollarguides.com/ http://www.domaining.in/ http://www.donatesearch.com/ http://www.dotrig.com/ http://www.doublemasti.com/dir/ http://www.downunderindex.com/ http://www.dpopace.com/ http://www.droolingmonkey.com/ http://www.duanegartman.com/ http://www.dynamutt.net/ http://www.earth-directory.info http://www.easy2upload.net/directory/ http://www.easydirectory.info/ http://www.eatseeker.ca/ http://www.ebuybao.com/ http://www.ecommerce-directory.org http://www.edirectorypages.com http://www.ehealthsites.com/ http://www.elegantdirectory.com http://www.elib.org http://www.eliteweb.cc/directory/ http://www.elitezone.org/directory/ http://www.english.hispanoempresa.com http://www.enterwork.net/directory/ http://www.entireaccess.com/ http://www.epooch.com/ http://www.esherlock.us/ http://www.eshopindex.com/ http://www.estate-zone.com/ http://www.etkal.com/ http://www.eurofind.biz http://www.evenseek.com/ http://www.evmina.com/ http://www.ewebindex.com/ http://www.ewolf.info/ http://www.exactseek.com http://www.excalibur-design.co.uk/ http://www.excellentweb.info/ http://www.exogama.com/ http://www.exoode.com/directory/ http://www.explodesearch.com http://www.ezilon.com http://www.fabaroo.com http://www.fabarooni.com http://www.fast4u.co.uk/ http://www.fastdir.info/ http://www.fastfindinternet.com http://www.fastpaths.com http://www.fatinfo.com/ http://www.favouritelink.com http://www.fetchingpodcasts.com/ http://www.financ-info.mylinea.com/ http://www.find.directorio-madrid.com/ http://www.finddatingpartners.com http://www.findgoodsites.com/ http://www.findhound.com http://www.findirectory.org/ http://www.findonce.co.uk/index.shtml http://www.findrex.com http://www.findsites.net http://www.findsome.info/ http://www.findtoplinks.com http://www.findwhatwhere.info http://www.fireon.info http://www.fishingrolodex.com/ http://www.fitana.com http://www.flexengine.com/ http://www.flyingwise.com/ http://www.forum2u.com/ http://www.forum-dir.net/ http://www.forumrating.com http://www.foundya.co.uk http://www.francethisway.com/directory/ http://www.franklyfinance.com/ http://www.free.catalog.nasze.net http://www.free-advertise.net/ http://www.freeadvertisingdirectory.com/ http://www.freearticlehq.com/directory/ http://www.freeclubs.net http://www.freefunnyhumor.com/ http://www.freekicktemple.com/directory/ http://www.freelance-designers.net/ http://www.free-legal-directory.com/ http://www.freelinkdir.com/ http://www.freenichelinks.com/ http://www.freeonlinedirectory.info/ http://www.free-seo-directory.com/ http://www.free-seo-directory.net/ http://www.freesites4all.com/ http://www.free-top.net http://www.freeurldirectory.com/ http://www.freewd.org http://www.freewebdirectory.biz/ http://www.free-web-directory.koollog.com/ http://www.freewebdirectory.org http://www.freewebsitedirectory.com http://www.free-website-directory.com http://www.freewebsitedirectory.com/ http://www.free-wedding-magazines.co...ing-directory/ http://www.freizeit.co.in/directory http://www.freshtv.com/ http://www.friendlyweb.info/ http://www.fsobc.org/ http://www.fx1.co.uk http://www.fxdir.com http://www.gamers-forum.com/phpLD/ http://www.gamingdirectory.co.uk/ http://www.gandalfdir.com/ http://www.gardenleisuredirectory.co.uk/ http://www.gawwk.com http://www.gdir.org/ http://www.gdirect.gdezigns.com http://www.gdotz.com/
http://www.websearchdir.com http://www.dirpeak.com http://www.yeahdirectory.com http://www.attackdirectory.com http://www.fearlessdirectory.com
http://dir.directorytrials.com/ http://directory.w3joint.com/
www.kingdomofurl.com
http://www.darkdir.com
http://www.yesmoretraffic.com/directory
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