Maths Careers this site, managed and maintained by the Institute of Mathematics and its Applications has extensive information on careers in Mathematics and applications of Mathematics in everyday life. Note the various tabs such as Science and Engineering at the top of the page.
Nrich (note you can search for a topic)
Mathematics in various cultures
A quiz to find a mathematician who shares your interests!
Mathematical Moments an extensive collection of pdfs on many different topics in science, nature, technology, and human culture.
Mathematical Gems and Understanding Mathematics from Peter Alfeld – University of Utah
Fractals video and Play with Fractals!
Mathematics News from Science daily
Reading list from Cambridge which should interest any student of Mathematics
STEP (university admissions papers)
Introduction to university Maths from the University of Bath
Mathematics for Students 