CPAN
The Comprehensive Perl Archive Network, the gateway to all things Perl. The canonical location for Perl code and modules. http://www.cpan.org/
National Comprehensive Cancer Network
NCCN, alliance of 19 of the world's leading cancer centers, is an authoritative source of comprehensive cancer care information that strives to insure the quality of cancer care and advance clinical research. http://www.nccn.org
CTAN
The Comprehensive TeX Archive Network is a set of fully-mirrored ftp sites providing the most complete, up-to-date TeX-related software possible. http://www.ctan.org/