I use these tools,just sharing: Link Popularity Tools Check Your REAL Link Popularity Tool Backlinks Analyzer Tool Backlink Anchor Text Analysis Keyword Tools Keyword Difficulty Checker Keyword Difficulty Tool Overture Keyword Selecter Tool Seobook Keyword Suggestion Tool MSN’s Keyword History Trends PageRank Tools Multiple Data-Center PageRank tool Fake PageRank Detection Display your PageRank on your site
How about RSS Feed tools? http://stub.passiveprogress.com - FeedStub submits your RSS Feed to many various RSS directories for advanced promotion and quick indexing.
Also the SEO Quake firefox extension rocks. For all your google and yahoo searches it adds PR, Indexed pages, yahoo backlinks, alexa rank, delicious bookmaks and many more on each search entry.
Thanks! I tried the first one that shows the number of links. It was way off. Showed links for google, but not for others. I wonder why every link checker gives a different result? It would be cool to know one that is accurate. :O)