you can try http://seoandsemexpert.wordpress.com/2009/07/19/free-directory-list/ here is 2000+ free Dir list ..
check freedirectorylist.com . But be sure that you are submitting your link only on high PR directory. They can only give you the quality back link service.
i do a good bit of submitting to free directories and the four most useful ones to me so far, and they tend to keep listings updated or give further info on the directory are the two listed at first http://directorycritic.com http://vmoptions.com and canadian's http://web-directories.ws and http://www.addurl.nu/ some of these others that i find out and around are not updated often enough, or have a good number of directories listed that are in fact no longer free, or else the page rank they have listed for the directory is often inaccurate/way off....personally, i use vmoptions nearly every week.
try these http://www.articlerich.com/ http://www.website-articles.net/ http://www.articlesalley.com/ http://www.softensive.com/ http://www.freearticledirectory.co.uk/ http://www.abcarticledirectory.com/ http://www.everyonesarticles.com/ http://www.990m.com/ http://www.articlezap.com/ http://www.stuffdaily.com/ http://www.articlecompilation.com/ http://www.britisharticledirectory.co.uk/ http://www.articlecodex.com/ http://www.umts-mi.com/ http://www.okarticles.com/ http://www.thatsmyniche.com/ http://www.niche-articledirectory.com/