Basic Concepts of Mathematics by Elias Zakon (Basic Analysis)
Mathematical Analysis by Elias Zakon
Calculus by Gilbert Strang
First Year Calculus by Willian Chen
Fundamentals of Analysis by William Chen
Introduction to Complex Analysis by William Chen
Multivariable and Vector Analysis by William Chen
Multivariable Calculus by George Cain and James Herod
Complex Analysis by George Cain
Real Analysis for Engineers by Erhan Cinlar and Robert J. Vanderbei
Advanced Calculus by Shlomo Sternberg
Complex Variables by Robert B. Ash and W.P. Novinger
Elementary Calculus: An Approach Using Infinitesimals by H. Jerome Keisler
Calculus Bible by Professor G. S. Gill
Calculus Without Limits by John C. Sparks
The Calculus of Functions of Several Variables by Dan Sloughter
Complex Analysis by Douglas N. Arnold
Functional Analysis by Douglas N. Arnold
Calculus Lecture Notes by the University of Toronto (with exams).
Calculus Course Notes by Joseph M. Ling
Differential Calculus Lecture Notes by David A. Santos
While downloading these books and course notes, I would like to warn you that the books and course notes are free under the conditions set by the authors, so please be aware about the conditions.
Also note that almost all the books and course notes are .pdf files.