### Online Enyclopedias & References

Wikipedia – Math Portal (probably the biggest online math encyclopedia already)

Mathworld (Eric Weissenstein at al’s Encyclopedia sponsored by Wolfram)

Springer`s Encyclopedia of Mathematics

PlanetMath

MacTutor-History of Mathematics

Integer Sequences Database

ETC – Encyclopedia of Triangle Centers

Plouffe’s Inverter

The Wolfram Functions Site (database for functions and formulas)

Functions and Curves Database

The Matrix Reference Manual

EqWorld – The World of Mathematical Equations

Physics and Mathematics for Young Learners – Reference/Dictionary

Platonic Realms (Math Encyclopedia & Mathe Quotes Database)

Stanford Encyclopedia of Philosophy

Mathwords (accessible/easy to understand desriptions of mathematical terms)

The Sci.Math FAQ

MathSearch (Documents, Articles, Publications)

The European MathematicalInformation Service

arXiv.org (free papers, eprints, preprints)

Mathematics Genealogy Project

### Online Tools

Calc 101 – Mathematica Functionality Online

Mathematica online (German)

The Wolfram Integrator (Online Integrals and Antiderivatives with Mathematica)

GCalc (Java Mathematical Graphing System)

Computer Algebra Online (SAGE, GAP, PARI, KASH, Maxima, Singular)

3d Function Plotter

QuickMath (Mathematica functionalities online)

Dario Alpern´s calculators (factorization, discrete log and much more)

MathBin.net (upload of math formulas based on Tex)

MathB.in (upload of math formulas based on Tex)

ImageShack (upload for pictures/graphics)

Pastebin (upload for ascii text & source code)

skrbl – shared drawing on a website

Equation Editor (Codecogs) converts latex formulas into various image formats

SymPy (computer algebra with Python)

### Portals & Tutorials & free Books & Lecture Notes

Math Forum Drexel (including Dr. Math)

@nrich(problems,games,articles,,forum for questions/answers)

Theorem of the Day

Matroids Matheplanet (excellent German math forum)

Problem Corner (math problem database)

Cut-the-Knot (Interactive Mathe, Puzzles & More )

Website of #math on the efnet (our sister channel)

PurpleMath-Algebra (Tutorials, Links, Infos & Help)

SOS-Math (tutorials for undergraduates and highschool students)

Tutorials for Calculus and Finite Mathematics

MIT OpenCourseWare – Mathematics

Karl’s Calculus Tutorial

Interactive Real Analysis

Visual Calculus

WIMS – Intercative Mathematics on the Internet

VIAS – Virtual Institute of Applied Sciences (free ebooks for statistics and geometry)

Connexions (collection of free scholary material – various math topics as well)

**FreeMath – a wiki listing free math books and providing reviews**

Free Textbooks in Mathematics (great and extensive collection of free math books by Alex Stef)

2020ok – directory for free math books

Historical Math Monographs (Cornell University Library)

Math Monographs (GDZ – Uni Göttingen)

### Software

**free:**

Maxima (a complete CAS)

GeoGebra (Geometry & Algebra, ruler and compass constructions)

GeoNeXT(Geometry, ruler & compass constructions)

Octave (Numercial Computations)

GAP – (Groups,Algorithms, Programming – computational discrete Algebra)

GCalc (Java Mathematical Graphing System)

SAGE (combining the functionalities of various math software such as Maxima, GAP, PARI/GP, Singular)

PARI/GP (fast computations in number theory)

Scilab (graphics, visualization, numerical math)

Microsoft Mathematics

for a fee:

Maple (CAS)

MuPad (CAS)

Mathematica (CAS)

MathCad (CAS, desktop publishing)

MATLAB (numerical math)

Cabri Geometry II and Cabri 3D

Euklid – DynaGeo

Cinderella – dynamical geomtry software that allows non euclidean geometries

### Computer Algebra Material

A short Maple Introduction

Mathematical Problem Solving with Computers (Maple)

Indiana University – Maple (tutorial and web resources)

Mathematica Documentation (online version of Wolfram’s book)

Mathematica Intro

### Miscellaneous

Fibonacci

Up for a challenge or how to become a millionaire …

The Erdös Number Project

Euclid’s Elements

Pascal’s Triangle – from Top to Bottom

The Prime Pages

Dr Vogel’s gallery of calculus pathologies

The Geometry Junkyard

MathPages (articles & problems on various math fields)

Tim’s Triangular Page

Flatland (a classic mathematical novel) – version with illustrations or without illustrations

Math Humour (Tanya Khovanova’s collection)

The Story of little Polly Nomial (a classic) – version 1 version 2

The Klein Four Group : Simple Finite Group (of order 2) as mp3 or WMV

Lobachevsky Song by Tom Lehrer

Tom Lehrer on derivatives, deltas & epsilons, math professors, sociology and mathematics in general

Tom Lehrer on “new math”

Möbius Transformations Revealed

### Teaching & Didactics

TIMSS – Trends in International Math and Science Study

PISA – Program for International Student Assessment

Mathematikum (Germany’s first math museum)

Dave’s short Trigonometry Course

Math AppletCollection

Mathematical Material for Tomorrow’s Teachers

Kangaroo (math competition problems for highschool students of all ages)

Karl’s Tutor Website is not working anymore. Another site is http://www.emathhelp.net

Comment by Paul — May 11, 2016 @ 10:10 am

thanks for info

Comment by undernetmath — September 5, 2016 @ 10:53 pm