iWeb Tool's Backlink Checker

This tool displays all the known links to your website. However it is limited to five queries per day.

Smart Page Rank's Backlink Checker

This is a tool similar to iWeb Tool's Backlink Checker, only this tool shows the anchor text used to link to you, and weather the link is nofollow, or not.

Google Position

This tool allows you to enter your website, and search phrases that you are trying to rank for, then it searches up to 1000 pages of google to see what position your site is.

Ranking Reports

This is another tool that is similar to google position, but it also searches Yahoo, AOL, MSN, AllTheWeb, and AltaVista, but it doesn't let you check multiple search phrases at once.