During the period of looking into my family history, I have found a few sites which are free for anyone to search the history of your family.
FreeCen provides a "free-to-view" online searchable database of the 19th century UK census returns.
FreeBMD is an ongoing project, the aim of which is to transcribe the Civil Registration index of births, marriages and deaths for England and Wales, and to provide free Internet access to the transcribed records.
Family Search The largest collection of free family history,
family tree and genealogy records in the world.
Make sure you double check your information, It is easy to think the person who have found is your relative, and believe me it will take down the wrong alley very quickly.
Have Fun looking for your long lost relatives.