Free searches available in certain databases. This publishing firm offers free and subscriber only database searches, articles and magazine information. FamilySearch Huge collection of information from the Latter Day Saints church.
Several databases are available, but be aware that the data is unverified and does contain errors.
Still a great source of clues to possible research. GenCircles Database of more than 15 million user-submitted names. If you find a match, you can leave a message for the submitter. The database will also alert you if someone else has submitted any of the same people. It is a simple process to add your data to the index and hopefully make connections with other researchers.