Link Harvester – unique linking domains, their IP addresses & unique c block addresses of the links
Top Web Directories – Rated by ILQ(Inbound Link Quality) – This list of Top Web Directories contains the Top Directories rated by the quality of inbound links each directory has.
Free Reciprocal Link Checking ToolReciprocal links have become one of the MOST popular methods of getting backlinks for your website. Although we don’t really recommend them, a lot of SEO’s have found success with their 2-way / 3-way reciprocal link exchanges.
Link Suggestion Tool – helps to find locations you may want to get links from for the keyword entered. Enter the keyword on the field, and click on GET SUGGESTED LINKS to generate Google and Yahoo searches for the keyword.
Yahoo! Site Explorer – allows you to see what pages you have indexed as well as the backlinks to those pages
Google Webmaster Central – allows you to sign up for Google Sitemaps, shows some crawling errors, broken links, and a fairly comprehensive view of your backlinks. You can also add anchor text checking to Google Webmaster Central by using this free Greasemonkey script.
Other Free Link Analysis Tools
Xenu Link Sleuth – Downloadable software which makes it fast and easy to find broken links on your site.
Backlink Watch – shows backlinks and anchor text used in the backlinks