Sites

Non-Newtonian Calculus (Popularity: )
http://sites.google.com/site/nonnewtoniancalculus/
Non-Newtonian calculus is a mathematical theory that provides scientists, engineers, and mathematicians with alternatives to the classical calculus of Isaac Newton and Gottfried Leibniz.

The Classification of the Polynomial with Real Coefficients (Popularity: )
http://www.nabla.hr/
Explains a theory that the algorithm that every polynomial transforms to a source form. On-line summary, CD version.

MAA Online Book Reviews (Popularity: )
http://www.maa.org/reviews/reviews.html
Indexed by author, title, topic and reviewer.

Mathematical Constants (Popularity: )
http://pauillac.inria.fr/algo/bsolve/
Website of the book by Steven R. Finch. With sample chapters, supplementary materials and further resources.