It’s a question coming up every now and then: which directories should i submit my site to? The guys over at Aviva directory have a nice and comprehensive article about the strongest directories. They consider what factors play a part in a directory being a good online directory, and quote good sources like Matt Cutts and Bob Mutts.
After that they went the extra mile and made a list of the best directories to submit your site to, based on Seomoz’s page strength tool. It’s a very cool list, with directories and their submission prizes. Among those are quite a few free ones if you’re willing to wait a while. I’d say: go check it out: “What are the Strongest Directories?“