Here is list of some famous mathematics blog, magazine and websites

Blog:-

What’s new

Blogger: Prof. Terence Tao, Fields Medalist.

 

Gower's Weblog

Blogger: Prof. Timothy W. Gowers, Fields Medalist.

 

Concrete Nonsens

(Group blog) Founders: Alexander Ellis (Harvard), Sam Lewallen (Princeton), Yan Zhang (Harvard).

 

AMS Graduate Student Blog

Editor-in-Chief: Kareem Carr.

 

PDE Blog

Blogger: Nestor Guillen,Graduate from University of Texas.

 

Women and mathematics

Blogger: S. Paycha, Dusanka Perisic, Marjo Lipponen.

 

Division by Zero

Blogger: Dave Richeson, Associate Professor of Mathematics, Department of Mathematics and Computer Science, Dickinson College.

 

Geometry and the imagination

Blogger: Danny Calegari,Professor of Mathematics,
Department of Mathematics,
California Institute of Technology

 

I Woke Up In A Strange Place

Blogger: Ioannis Parissis,Mathematics Dept of IST.

 

A Day in the Life of a Wild Positron

Blogger: Student, Princeton University.

 

392C: Geometric Group Theory

Blogger: Henry Wilton, Univ of Texas (Presently at Univ College, London).

 

Virtual Math Tutor

 

Tanya Khovanova’s Math Blog

MAA NumberADay

 

MAA MinuteMath

 

 

Magazine:-

Plus Magazine

 

The American Mathematical Monthly

 

 

Website:-
Number Theory Web

 

Wolfram MathWorld

 

The Math Forum The Prime Pages
International Mathematical Union (IMU) International Mathematical Olympiad
American Mathematical Society

 

Mathematical Association of America
Clay Mathematics Institute The Abel Prize