The Sojourner Truth Project
https://www.thesojournertruthproject.com/
An online resource dedicated to promoting the first publication of Sojourner Truth's 1851 speech and discussing the differences between that speech and Frances Gage's 1863 version.
National Women's History Museum: Sojourner Truth
https://www.womenshistory.org/education-resources/biographies/sojourner-truth
Overview of Sojourner Truth's life and contribution from the National Women's History Museum
How Sojourner Truth Used Photography to Help End Slavery
An interesting account of the way Sojourner Truth used her image to spread her ideas - well before the ease of social media!
Anti-Slavery Bugle (1851)
https://chroniclingamerica.loc.gov/lccn/sn83035487/1851-06-21/ed-1/seq-4/
The Library of Congress link to the original copy of Sojourner Truth's speech in the Anti-Slavery Bugle.