The Blackstone Library has a number of resources available for people seeking citizenship. There are brochures about citizenship and the naturalization test as well as two toolkits that can be checked out. These contain flash cards, a DVD, the Declaration of Independence and Constitution, a Welcome Guide and brochures on U.S. History and Government.
There is an Official USCIS Civics Test Study app available for free on the Google Play and iTunes stores.
There are also a number of online resources available to those seeking citizenship. For those needing legal services, visit this page of the U.S. Citizenship and Immigration Services website. The USCIS website also provides links for learners on the Citizenship Resource Center page.