FreeCalc is a complete collection of Calculus I-III (single and multivariable) materials in LaTeX, including lecture slides, homework assignments, answer keys, solutions, and course notes/textbook. I originally created these slides while lecturing at the University of Massachusetts Boston, and later developed them further with the help of a group of undergraduate students. Todor Milev, at UMass Boston, now leads the project and produces new material. The subversion repository can be found at the FreeCalc SourceForge page.