History.com: The Civil Rights Movement
Cornell Legal Information Institute: Civil Rights: An Overview
Digital Public Library of America: Civil Rights
Library of Congress: The Civil Rights Era
We Shall Overcome: The Need for Change
We Shall Overcome: The Civil Rights Movement Players
We Shall Overcome: The Strategy
We Shall Overcome: The Prize: The Civil Rights Act of 1964
We Shall Overcome: Historical Places of the Civil Rights Movement
Digital Public Library of America: Civil Rights
Google Arts & Culture: Civil Rights Movement Portal
InfoPlease: Civil Rights TIMELINE
MLK Center: Glossary of Nonviolence
DPLA Online Exhibit: Activism in America (includes Civil Rights Movement and more!)