OHGen.net is full of History and Genealogy Tools for Genealogy Researchers
There is a great deal of information which can be found on the website listed above to those who know how to search it. Using the FamilySearch's Family History Library Catalog's county batch record numbers is a quick way to figure out if your ancestors record is located at a county courthouse in most states. The LDS church members have voluntarily traveled around the country and microfilmed available courthouse and church records and made them searchable online. On this site is listed the batch record numbers by county which are to the indexes for these microfilmed records. Basic information is provided for each record. You can use the information to order a copy of your ancestors record from a family history library near you or a specific county courthouse as the volume of the probate record is often listed. Try many different spellings for your ancestors surnames as courthouse clerks often mispelled first and last names.