There are many interesting genealogy sites I have found. I will list some below. A lot of them have free search tools to find your families.
Ancestory.com is my favorite site to use for searching for my ancestors. Make sure to bookmark this one!
Cyndi's list has almost all you will need to do your research. There are a lot of links to genealogy pages on Cyndi's page. A must see for those working on their genealogy.
Roots Web has message boards, search tools, mailing lists, passenger lists to some ships, and many other helpful links or tools.
This web site has thousands of websites and email addresses categorized by surnames for you to find your family. I am also a volunteer with this web site.
Family Tree Maker is the software I use to store all my genealogy information. This site has a search tool and many other helpful tools to do your genealogy.
This site contains a search tool. The main church is in Salt Lake City, Utah. I found a good amount of information on this site.
This site contains a search tool, message boards, and helpful web sites.
This site has an excellent and very extensive message board.
Another Billger relative I found online. Alan Bilger manages this site. This is his site and the research he has. Excellent resource for Billgers!
An excellent site when searching for Poland Border Surnames is the PBS website. Their is links here to help your research as well as surnames and links to the people with those surnames. They also have a mailing list which is excellent!