• MIT Professor Gil Strang's series of videos
  Intended to anyone interested in learning the basics of calculus.

• Community Calculus
  PDF, 2.3 MB

• Preparing for the AP Calculus AB Exam – Part 1: Derivatives
  An edX course produced by RICE University

• Calculus 1A: Differentiation
  

• Calculus 1B: Integration
  

• Calculus (all content, first year) by Khan Academy

• Hippocampus.org: Calculus and Advanced Math

• MIT OpenCourseWare: Single Variable Calculus and Single Variable Calculus

• Wolfram MathWorld: Calculus and Analysis
  Extensive mathematics web resources

• Mathtools and Math Topics for Calculus
  Web materials supported by the National Science Foundation