The Rancocas Valley Journal of Applied Mathematics
Visit the Math Forum at Drexel University, Philadelphia, Pa.
SOS Math A college-level general mathematics refresher or tutorial
Eric Weisstein's World of Mathematics by the author of the CRC Concise Encyclopedia of Mathematics
Planet Math, a people's math encyclopedia
NIST Dictionary of Algorithms, Data Structures, and Problems
The Journal of Online Mathematics
The Cost of Scientific Journals
Elsevier US Dollar Price List for Scientific Journals (4.5 Mb., PDF)