Ancestry.com is allowing free searches of Sons of the American Revolution applications through July 4.
This database contains applications for membership in the National Society of the Sons of the American Revolution approved between 1889 and 31 December 1970. The applications are arranged in packets. It may be helpful to scroll through the images to find all information relating to the applicant.
The DAR has a database that allows searches of patriots and descendants. I discovered that an ancestor of mine did serve in the Revolutionary War and several people have achieved membership in the DAR through one of his children. I am descended from another child, but it shouldn't be too difficult to prove.