milter manager is a flexible and low administrative cost anti-spam system that can be used with MTAs that support milters like Sendmail and Postfix. It provides an effective solution by combining a range of existing milters.
Nucleus CMS helps you manage multiple weblogs with multiple authors on
your own server. Its main features are speed, extendability through
plugins, and standards compliance.
A secure Linux system with Grsecurity and many penetration tools.
A control protocol for various astronomical instruments (telescopes, CCDs, etc).