If you are reading these pages, you may find the links here interesting. However these are just a few links, mainly put here for my own use.
"mathematical groups"
Cayley tables and Cayley diagrams.
"This Week's Finds in Mathematical Physics"
by John Baez.
Over 280 weeks' worth of fascinating discussions, e.g.
Some Thoughts on the Number 6
by John Baez.
Explains the extra outer automorphism of S6.
Orders of non abelian simple groups
Coxeter-Dynkin diagram
Coxeter group
List of finite simple groups
Copyright N.S.Wedd 2009