Geometry Formulas and Facts:
An excerpt from the 30th Edition of the CRC Standard Mathematical
Tables and Formulas.
http://freeabel.geom.umn.edu/docs/reference/CRC-formulas/
Standard Mathematical Tables and Formulae:
Information and errata for the 29th and 30th print editions and new
electronic edition of this book.
http://smtf.mathtable.com/
PlanetMath:
A collaborative encyclopaedia with entries contributed under the GNU
Free Documentation License.
http://planetmath.org/
Math2.Org:
Formerly Dave's Math Tables. Mathematical tables on-line and
downloadable.
http://www.math2.org/
Digital Library of Mathematical Functions:
This mockup gives an idea of the current ideas about the design and
organization of the new Digital Library; these ideas are, of course,
subject to change. Content only is only available in a few places.
http://dlmf.nist.gov/
Platonic Realms:
Online resource for the mathematics community: links library,
bookstore, quotes, and online articles.
http://www.mathacademy.com/pr/index.asp
Math Assistance:
Lists rules and formulas for a number of mathematical subjects, such
as plotting graphics, functions, factoring, derivatives, integrals,
matrices, vectors, and numerical analysis. In English, French and
Turkish languages.
http://www.ercangurvit.com/
Math Tables, Facts and Formulas:
A mathematics reference collection of "K through 14" math tables,
facts, definitions, formulas and explanations: compiled by Colby
Community College Mathematics Department.
http://www.colbycc.org/www/math/math.htm
Summation Formulae:
For polynomials of degrees up to 50, generated using the Euler-Maclaurin
method.
http://polysum.tripod.com/
Quick Reference Pages:
Free reference covering many topics, by Tim Martin.
http://www.asymptotic.co.uk/reference/
Mathematical Atlas:
A topical guide to modern mathematics that explains the
subdisciplines. Includes graphics that represent their relative size
and relationship.
http://www.math.niu.edu/~rusin/known-math/welcome.html
Numbers and Numerical Prefixes:
Tables for Greek and Latin number values alone and as a part of
other words.
http://phrontistery.50megs.com/numbers.html
Math Reference:
References, charts, graphs, and tables in basic arithmetic, algebra,
geometry, trigonometry, calculus, statistics and linear algebra.
http://www.MathReference.net/
F2 - Math Formula Finder:
Produces equations that match the name of the formula from a list.
Can add onto the selection. Uses MathML coding.
http://f2.moris.org/