Footnote.com through its partnership with the U. S. National Archives makes wonderful content available such as Revolutionary War pension files and much more. Currently, the company is offering free content in a variety of packages:
1. Access to their Historical Newspaper collection is available free for the month of May;
2. Access to all collections for 7 days; or
3. Access to a basic free membership.
Be advised that options 1 and 2 above will require you to enter a credit card number and the account will roll into a paid subscription after the free period ends. If you are disciplined enough to cancel the subscription be the time it ends, these accounts are a great way to get an idea about whether or not a regular subscription would be worth while for you. If not you may be better served by the basic free membership--option 3 above. It will not give you the same access of the other options but it is a good starting point.
If you have never explored Footnote.com, it is well worth your time to investigate the content offered here and it's ability to further your family history research.