Blind Search allows you to compare the results of Google, Bing and Yahoo. You search for a term in it, and it brings up all 3 results side-by-side, but you are not told which site is which. You then say which you think is better, and the names are then revealed!

After using the site a dozen or so times, a clear image of what is the best search engine for you forms.

I was surprised that Google was only best for me in about a third of searches; I found Bing’s results much more relevant. (The creator of the site works for Microsoft though; although it isn’t affiliated to them!)

They also offer an OpenSearch plug-in (so it can be added to Firefox’s search bar, for example) and a plugin IE8. It also works for image search. Unfortunately, the site currently only works in US localisations, so one can’t use it to search google.co.uk etc.