American Institute of Mathematics Open Textbook Initiative http://www.aimath.org/textbooks/textbooklist.html
Florida State University Mathematics WWW Virtual Library http://www.math.fsu.edu/Virtual/index.php?f=10
UNISA List of Online Textbook Sites http://www.unisa.ac.za/Default.asp?Cmd=ViewContent&ContentID=27728
Free Online Computer Science and Programming Books, Textbooks, and Lecture Notes http://www.freetechbooks.com/
Free Online Mathematics Books http://freecomputerbooks.com/mathCategory.html
Speed Math Trainer http://www.jimmyr.com/blog/Speed_Math_Trainer_Program_126_2006.php
Khan Academy https://www.khanacademy.org/a/tn8h
Understanding Algebra http://www.jamesbrennan.org/algebra/
College Algebra http://www.mathsisfun.com/algebra/index-college.html
Algebra Practice http://www.math.com/practice/Algebra.html
Skill in Algebra http://www.themathpage.com/alg/algebra.htm
Basic Rules of Algebra, Algebraic Fractions, Laws of Exponents, and Roots/Radicals by Charles Ormsby http://faculty.uml.edu/rbrent/128/Basic%20Algebra.pdf
Basic Maths: http://www.mathstat.strath.ac.uk/basicmaths/
Reasonable Basic Algebra http://www.freemathtexts.org/Standalones/RBA/Downloads.php
Euclid's Elements http://aleph0.clarku.edu/~djoyce/java/elements/elements.html
Dave's Short Trig Course http://www.clarku.edu/~djoyce/trig/
Dave's Short Course on Complex Numbers http://www.clarku.edu/~djoyce/complex/
Precalculus: College Algebra and Trigonometry http://courses.wccnet.edu/~palay/precalc/
Combinatorics Through Guided Discovery http://www.math.dartmouth.edu/news-resources/electronic/kpbogart/
Discrete Probability Video Course http://openclassroom.stanford.edu/MainFolder/CoursePage.php?course=Discr...
Discrete Probability Wikibook http://en.wikibooks.org/wiki/High_School_Mathematics_Extensions/Discrete...
Game Theory Textbook http://www.economicsnetwork.ac.uk/teaching/Online%20Text%20and%20Notes/G...
The Book of Proof http://www.people.vcu.edu/~rhammack/BookOfProof/
