Yahoo site explorer has closed down so these are some free alternatives 1.SEOMOZ Site explorer (free sign up required) 2.backlinkwatch 3.opensiteexplorer.org 4.http://seopro.com.au/free-seo-tools/link-checker/ 5.Alexa [FONT="]Feel free to add your own, I started this thread as I saw a bunch of people asking the same question.[/FONT]
backlinkwatch and open site explorer and also have heard of Bing Webmaster tool that will also show back links.
SEOMOZ site explorer and Opensiteexplorer.org both are same... It's indeed a very good alternative for Yahoo Site Explorer... It would have been better if they have integrated Yahoo Site Explorer into Bing Webmaster...
I was looking for an alternate to the Yahoo site explorer now that it has shut down. If only it hadn't happened. The thing is that you can't get any good sense for free these days.