Useful Links

Link	Description
Fuelly	Fuelly lets you track and share the fuel consumption of your vehicle. Also allows you to post and share pictures with others
SearchTempest	This website searches eBay and all craigslist locations in any selected radius, with options for more search engines. You can use this site for more than just cars of course, but I find it makes searching for cars for sale, or even parts into a much easier process
WillTheyFit	This online tool helps you calculate wheel and tire fitment for any wheel/tire combination, including speedometer error and showing you simulated tire stretch for varying wheel/tire combinations.