The NSDAR has recently released online versions of their 2008 and 2012 Supplemental publications, Forgotten Patriots – African American and American Indian Patriots of the Revolutionary War: A Guide to Service, Sources, and Studies.
The book identified more than 6,000 African American and Native Americans who participated in the American Revolution.
Below is a link to their website where you can access the pdf files.
http://www.dar.org/library/fp.cfm
The bottom of the web page includes contact information for researchers who may have questions or additions and corrections to add to future supplements to this publication.