Fast Blog Finder and Comment Hut are the ones I have used. These are the main ones on the market. I don't really think they are worth the money to be honest. You're not going to be able to find that many dofollow blogs that are relevant to what you are trying to get a link for. Even if you do find some, many of the websites wont let you anchor the link for your keyword because they're stupid and consider it spam.

Correct _internet_, i also have fastblog finder, but shouldnt these tools have a feature that will tell u which dofollow blogs allow posts and which allow u to anchor the link for your keyword?

We are using Blog Comment Demon now for several weeks and the software is amazing. Has some amazing features, it even checks whether your comment has been approved. It's offered by the same developer of Book Marking Demon.

Fast Blog Finder is a good tool...i have been using it for a long time...and the only thing that pops on my mind that i tried actually

Guys, It is better not to stick with any automated finders, Manual really works a lot,
Have you all try with "Notify me when new comments are added" Keyword
command on google....... You will get a huge list of dofollow blogs.... DON'T Spam them, leave valuable comments and get links

Fast blog finder is good, really really good. try it