http://www.saynoto0870.com/I get wound up by companies that use 0845 an 0870 refuse to give you their geographical number. They must know that 99% of customers get free calls to geographical numbers so 0845 and 0870 really are premium rate. The database isn't 100% accurate but its good enough.
http://maps.google.co.uk/Very fast and usable maps and they seem to keep adding features. You can do route planning too.
http://svp.co.uk/Price, quality and user reviews. I use it mainly for boring stuff like printer ink and paper but its SO much cheaper than anywhere else. You can also view their range of produced priced per package or per item (e.g. per sheet of paper) which save on all that mental arithmetic!
http://www.skyscanner.net/Compares flights but includes budget airlines. Also allows you to look broadly across several airports or longer broad time period which is brilliant if you are flexible but want best value.