Following is a list of PR4 Search Directories (Free and reciprocal) where you can submit your website URL. Drill down to the most relevant category, fill in the form and if approved by the moderator, your website gets a backlink from a PR4 website.

Following is the List of Free Blog Directories( with PR):

http://www.localsites.ca/
http://www.startpage.ca/
http://dotukdirectory.co.uk/
http://www.ectrade.com/
http://www.la-toile.com/
http://www.ccwos.com/
http://www.infobanc.com/
http://www.zeezo.com
http://kk-club.com/
http://www.allworldlinks.com
http://www.slackalice.com/
www.codeamed.org
http://www.pedsters-planet.co.uk
http://www.linkgrinder.com/
http://www.amray.com/
http://www.directorystorm.com/
http://www.thedailycartoonist.com/
http://www.a1webdirectory.org
http://www.poddys.com
http://www.devoteclub.com/
http://gzzt.org/
http://www.amfibi.com/
http://www.changinglinks.com/
http://www.intelseek.com/
http://gzzt.org/
http://www.cipinet.com/
http://www.spheri.com/d/
http://a2zwebindex.com
http://www.jaborwhalky.com/
http://www.webbieworld.com/