I do a lot of directory submissions for my sites, so I put together a list of directories. The free directory list is updated often, and allows sort options to fit most submission styles. I hope you find it a useful resource.

One thing I'd like to mention is that we should not chase high PR directories with free submissions (except Yahoo and DMOZ). Most free directories that have high PR also have long waiting lists to be reviewed. They also have higher listing standards then newer directories.

Well established/high ranking directories normally have many listings. New sites can get tossed on page 20 or more. This is why submitting to newer directories provides faster indexing results.

Directories tend to have many outbound links, so the PR they pass is minimal - no matter what the homepage PR may be. So there is really not much difference being listed in a category with no PR from either a PR 4 or PR 0 directory. Directories are most useful for defining our anchor text to the SE's, plus gaining a little bit (very little) of additional traffic. We do get some PR juice as well, but it is minimal compared to other legitimage link building methods.

Seriously. It's much better to be listed in a PR 0 directory then it is to be waiting months to be listed in a PR 4 directory. That's the point I'm trying to make - that results from free submissions to high PR directories are not immediately realized. If it's a good directory, it's probably worth spending a few bucks to get an express review.

The tips above have worked well for me, and I hope it helps everyone else as well.