Links
Mathematical resources
AMS, MSC 2020, MathSciNet
EMIS, Platonic Realms, PlanetMath
Wolfram MathWorld, ZbMATH

Archives
Groups, Representations and Cohomology,
Front end for arXiv, GDZ, Springer Link,
Electronic Library of Mathematics, JSTOR

Journals
Journal of Algebra, J. Pure Appl. Algebra,
Journal of Group Theory,
Communications in Algebra,
Linear and Multilinear Algebra,
Algebras and Representation Theory,
Algebra Colloquium, (also here),
Representation Theory - AMS Journals,
J. of Algebra and Its Applications,
Beiträge zur Algebra und Geometrie,
Algebra and Discrete Mathematics,
Theory and Applications of Categories

Mathematics competitions and K12
Int Math Competition for University Students,
German Olympiads, Mathcounts,
Mathematical Association of America (MAA),
Kozepiskolai Matematika es Fizika Lapok,
Alexander Bogomolny's Puzzles Page,
Math Forum, MathPages

Mathematical Societies
IMU, EMS, SMF, AMS, DMV, LMS, SSMR
Groups, Algebras, Representations
FDLIST - Repres theory of finite dimensional algebras
Broué's Abelian Defect Group Conjecture (J. Rickard)
Results on Dade's Conjectures (J.B. Olsson)
ATLAS of finite group representations
New York Group Theory Cooperative,
Category Theory: Bob Roesbrugh

Miscellany
History of Math: MacTutor St Andrews, Clark,
The Mathematics Genealogy Project,
Mathematical Quotations Server

LaTeX & e-Publishing
TeX Users Group, CTAN, AMS, DANTE,
TeX editors, Xy-pic, MiKTeX,
Ghostscript & Ghostview, MathML, OpenMath

IT
ZDNet, CNET, PC World, PCMag,
Webopedia, NIST Algorithms and Data Structures,

Travel
Deutsche Bahn, Eurolines, Cluj Airport, CFR,
Money, Wunderground, Intellicast, Weather Channel

Encyclopedia
Nature, Scientific American, National Geographic,
Science, MIT courses, Project Gutenberg, MEK,
Encyclopaedia Britannica, Wikipedia,
Internet Archive, Skeptic's,
Stanford Encyclopedia of Philosophy
Departments and Institutes
Oberwolfach, Luminy, Cambridge, Berkeley,
Rényi, Jena, Jussieu, Aachen, Bielefeld, Oxford,

Research Funding
AvH, DAAD, JSPS, Fulbright, MTA,
CNCSIS, Edu, MCT, UEFISCDI

Software
GAP, MAGMA, CHEVIE,
Symmetrica - Groups,
CREP - Combinatorial REPresentation theory,
MathWorks - Symbolic computations,
SINGULAR - Polynomial Computations (Kaiserslautern),
CoCoA - Commutative Algebra (Genova),
Macaulay 2 - Algebraic geometry (Urbana-Champaign),
KANT/KASH - Algebraic Number Theory (TU Berlin),
PARI / GP - Number theory (Bordeaux, Paris XI),
SIMATH - Number theory (Saarbruecken),
Polymake - Polytopes and polyhedra (TU Berlin),
REDLOG - Computer logic system (Passau),
Maple - Waterloo Maple,
Mathematica - Wolfram Research,
SageMath - free open source

Number Theory Pages
The nth prime page - Get the nth prime,
The Mersenne Prime Search,
The prime page - Prime number resources,
The number theory web,
HotBits - random number generator,
Encyclopedia of Integer Sequences


Personal Homepages

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