KDnuggets -- major portal for KDD related topics
ACM SIGKDD Explorations -- tutorial type articles on currently hot topics
Survey papers
Application papers
UCI dataset -- University of California Irvine data set
EachMovie -- Compaq Corporation's EachMovie Dataset
KDD CUP dataset -- KDD Cup information
1998
KDD CUP dataset
1999 KDD CUP dataset
IBM Synthetic Dataset -- Dataset used in many research papers
The Weka Package -- Java based Data Mining Package
C4.5 Decision Tree -- Release 8
UWML -- from University of Washington, Seattle USA