Calculus

Calculus

A calculus textbook by Benjamin Crowell.

Calculus for Engineers

An older book written by John Perry.

Calculus Without Limits-almost

More on calculus without limits (or non-standard analysis) by John C. Sparks.

Calculus Bible

A short book (compared to the Bible) on calculus.

Analysis of Functions of a Single Variable - A Detailed Development

Another short book of elementary calculus by Lawrence W. Baggett

Mathematical Background: Foundations of Infinitesimal Calculus

The “theorem - proof” approach to calculus by K. D. Stroyan

Elementary Calculus - An Infinitesimal Approach

Non-standard analysis (also known as calculus without limits) by H. Jerome Keisler.