blq is a Perl script that queries one or more lists, such as the MAPS RBL or MAPS DUL, to determine if a host is listed as a potential source of spam or email abuse.
pxytest is a commandline utility which tests a host for open proxies
that are vulnerable to spammer abuse.
The web-chpass utility allows users to change
their account password through the Web. It
was written with security and flexibility as the
primary concerns, and runs on systems that
use PAM to manage user authorizations.
xtail is sort of a tail -f for many files. It's a great way to monitor log files.
A suite of addons for Nagios.
A high performance ORM for Java.