Mugen : Infinite Analysis (Osaka)
KAN : Rings and Computer Algebra (Kobe)
Oshima : Lie Groups and Representation Theory (Tokyo)
Nishiyama : Web Server of Representation Theory (Kyoto)

MathSciNet : Math. Review on the Web (accessible only from licensed domains)
SIAMOPSF : Orthogonal Polynomials and Special Functions
CRM : Centre de Recherches Mathematiques (Montreal, Canada)
MSRI : Mathematical Sciences Research Institute (UC Berkeley, USA)

Mathematical Societies

The Mathematical Society of Japan
American Mathematical Society
The Australian Mathematical Society
The French Mathematical Society
New Zealand Mathematical Society
London Mathematical Society
Deutsche Mathematiker - Vereinigung
Canadian Mathematical Society
European Mathematical Society
Edinburgh Mathematical Society