This site occasionally offers one month free usage. They will give you places to search for records also. It's basically setup as US GenWeb is setup. Check their archives and other data for your family surnames and other links and pages they have available for you.
Some features are free.
Some are not. Watch for freebies. List of Polish that died at Katyn, Charkowie, Twerze, Borowiczach Poland Border Surnames Mail List Archives Search our archives of letters. When you reach the first page, type in PolandBorderSurnames with no spaces between the words. This is a good way to see if anyone in the past has submitted a surname you are researching that may not be on the mail list anymore.