Once I listed books on Algebra and Related Mathematics in this article, Since then I was receiving emails for few more related articles. I have tried to list almost all freely available Calculus texts. Here we go:

- Elementary Calculus : An approach using infinitesimals by H. J. Keisler
- Multivariable Calculus by Jim Herod and George Cain
- Calculus by Gilbert Strang for MIT OPEN COURSE WARE
- Calculus Bible by G S Gill [
*Sometimes this link work, and, randomly it won’t*.] - Another Calculus Bible by Neveln
- Lecture Notes for Applied Calculus [pdf] by Karl Heinz Dovermann
- A Summary of Calculus [pdf] by Karl Heinz Dovermann
- First Year Calculus Notes by Paul Garrett
- The Calculus of Functions of Several Variables by Professor Dan Sloughter
- Difference Equations to Differential Equations : An Introduction to Calculus by Professor Dan Sloughter
- Visual Calculus by Lawrence S. Husch
- A Problem Text in Advanced Calculus by John Erdman
- Understanding Calculus by Faraz Hussain
- Advanced Calculus [pdf] by Lynn Loomio and Schlomo Sternberg
- The Calculus Wikibook [pdf] on Wiki Media
- Vector Calculus
- The Calculus for Engineers by John Perry
- Calculus Unlimited by J E Marsden & A Weinstein
- Advanced Calculus by E B Wilson
- Differential and Integral Calculus by Daniel A Murray
- Elements of the Differential and Integral Calculus[pdf] by W A Granville & P F Smith
- Calculus by Raja Almukkahal, Victor Cifarelli, Chun Tuk Fan & L Jarvis
- A course of Pure Mathematics by G. H. Hardy

What a great resource! Thanks for posting this. I’m happy to find a couple of good free vector and multivariable calculus books; that will be useful for both me and my students!

Thanks for putting this together, and for sharing it.

Thanks for sharing this list. I have a title to add: “A Course of Pure Mathematics” by G.H. Hardy. Available free from archive.org.

http://archive.org/details/coursepuremath00hardrich