The AMS Public Awareness Office recommends these mathematics websites which have extensive links to a wide range of resources on various mathematical topics at all levels, including: the history of mathematics, mathematicians, current research, and video collections.
Wolfram|Alpha's long-term goal is to make all systematic knowledge immediately computable and accessible to everyone. Data can only be downloaded if you pay for pro, but still worth toying with.
Scientific American covers the advances in research and discovery that are changing our understanding of the world and shaping our lives. Provides need-to-know coverage, insights and illumination of the most important developments at the intersection of science and society.
