I have a .pdf file you can download from my site listing 200 or so directories you can list your site in. Almost all of them offer free submission and do not require a link back. I update the list every week or so as I find more on my searches, if any members have a directory that fits in with this theme that is not already listed then please let me know and I will add it next update. Hope this of some help to you.
I will add any directory that is free and doesn't require a mandatory reciprocal link. What subject(s) the directories cover is not of concern - people here checking the list out can make their own minds up which ones to submit to.
I just launched a new directory this week, which you are welcome to add to your list if you like. It's very niche though - it's for mortgage loan officers. http://www.loaninfohome.com in case you'd still like to add it.
You might want to remove these duplicates from the list: http://directory.xperts.ro/ http://jaspercountydirectory.com/ http://www.jimac.co.uk/ Also, the link you list for Yahoo is the $299 link: http://add.yahoo.com/fast/add?38525+bUKIE/ The free link is: http://docs.yahoo.com/info/suggest/ Of course, Yahoo has ignored every submission I have sent them.
bhanvad.com seems to have gone 100% pay. It lets you follow all of the steps to submit for free, then at the last moment it whacks you: It's quite rude of them to hide this until you have entered all of your data. It's quite difficult to determine what they are really trying to say due to the language barrier.
http://jameshendrix.com/seo/html/ should be listed by its public URL: http://www.wide-world-directory.com
Wowza, a whole bunch of the directories on this list are cheesy clone directories operated by a member of the Digital Point Ad Network. Some of these directories are: Demotte 411 Demotte Directory Directory Buddy Directory Dude Jasper County Directory Indiana Finder Monkey Directory NW Indiana Directory Oh Goody Sites Okay Directory Site Folders HTML Easy Lost Traffic Easy Folders and many more... What do Digital Point forum members think of this weight building scheme?
http://www.freesitetools.com forwards to http://www.webmastertoolscentral.com/ This directory requires a reciprocal link.
Wow, thanks for all the feedback Will, looks like I'm going to be busy with this list for a while too. That yahoo link must have changed in the last couple of days because I used it to make a free submission myself. I think I did mention that "most" are free and non-reciprocal - I knew a couple were not but hadn't made a note of which ones so thanks for pointing them out.
www.search.able2know.com uses CGI scripted links. My guess is that this prevents it from passing PageRank and keyword relevance, which makes Able2Know pretty darned near worthless for SEO purposes.