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- Algemath
- arXiv: open access to e-prints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics
- Ask Dr. Math
- CAN (NL)
- CWI (NL)
- Departement Wiskunde KUL (BE)
- Experiment and Explore Mathematics
- ExploreLearning
- Faculty of Mathematical Science (University of Twente) (NL)
- Walter Fendt (DE)
- Getallenleer als basis voor Excel
- Freudenthal Instituut voor didactiek van wiskunde en natuurwetenschappen
- iMath (basisonderwijs)
- Leren.nl: wiskunde
- Mathenpoche est un logiciel gratuit composé de centaines d’exercices de mathématiques
- Nederlandse Vereniging van Wiskundeleraren
- MAA Online: Mathematical Association of America
- MathForum
- Mathgoodies
- MathMastery
- Mathplayground
- MathQuiz.io
- Mathsnet
- MathSphere
- Matific
- MIT: Mathematics
- PARI/GP Development Headquarter: computer algebra system designed for fast computations in number theory
- PhysMath Central
- Praeter software
- Raadsels
- EN
- 3 Solved Math Mysteries (and 2 That Still Plague Us) | Mental Floss
- Clockstone: Enigma Riddle Page – Math, Logic & Physics
- List of unsolved problems in mathematics – Wikipedia
- FR
- Bric-à-brac d’énigmes et de problèmes
- Enigmes mathématiques et solutions
- Enigmes : mathématiques
- Jeu de maths : La chambre aux énigmes
- Maths et tiques: Enigmes
- NL
- hhofstede: Wiskundige Raadsels
- Raadsels en puzzels
- Wiskunderaadsels.nl
- WiskundeRaadsels
- Rechneronline – Nützliche Rechner
- Société Mathématique de France
- Software
- AlgoSim: numerical analysis and visualisation, and physical simulation.
- Geocadabra: meetkunde programma
- GeoGebra: a dynamic mathematics software that joins geometry, algebra and calculus
- hpCalc: software for and information about the HP49, HP48, and HP28 RPN programmable graphic calculators and the HP38G, HP39G, and HP40G programmable graphic calculators
- Numerical Solutions: Software: Linear Algebra – Functions – Ordinary Differential Equations – Systems of Nonlinear Equations – Multiple Integration – Maxima and Minima – Functions and Equations – Regression – Approximation & Interpolation – Stereographer – Math Miscellanea – Support Software – Numerical Methods: – Integration and Differentiation – Solution of Equations- Maxima and Minima – Approximation of Functions – Regression – Polynomial Regression – Fast Fourier Transforms – Differential Equations Linear Algebra Methods – Miscellaneous Procedures
- Math Mechanixs: grapings, calculus, curve fitting, matrices
- MathMod
- Mathsol: software
- MathType
A tool for Windows and Macintosh that lets you create mathematical notation for Word processing and desktop publishing documents, web pages, presentationas and more - MATlab
- Redmill calculator
- Wolfram: Mathematica
- STEM-academie: science, technology, engineering, maths
- Strive: real world math
- TI
- Uitwiskeling
- Wezooz
- Wisfaq (NL)
- Wiskgenoot – Koninklijk Wiskundig Genootschap
- Wiskundig Genootschap
- WisWeb
- Wolfram: blog, demonstrations, education portal
- WolframAlpha: online rekenen en tekenen
- Wolfram Mathworld