PDFjam is a small collection of shell scripts that provide a simple interface to some of the functionality of the pdfpages package for pdfLaTeX. Facilities include n-up imposition, page rotation, reflection and trimming, selection of pages, and many more. PDFjam depends on a working installation of (pdf)LaTeX, complete with the pdfpages package. For Mac OS X, some example applications (droplets) are provided for drag-and-drop access.
maildirproc is a program that processes one or several existing mail boxes in the maildir format. It is primarily focused on mail sorting, which means moving, copying, forwarding, and deleting mail according to a set of rules. It can be seen as an alternative to procmail, but instead of being a delivery agent (which wants to be part of the delivery chain), maildirproc only processes mail which has already been delivered. That is a feature, not a bug.
t-prot (TOFU Protection) is a filter which improves the readability of email messages and Usenet posts by hiding some of their annoying parts. The annoyances it handles include mailing list footers, signatures, TOFU, sequences of blank lines, and repeated punctuation. TOFU is an acronym that stands for "Text oben, Fullquote unten", a German reference to the practice of adding just a few lines of original text and quoting a complete message below them.
BarricadeMX provides very accurate, high performance spam and virus protection for Enterprise and ISP sites. Features include simple installation and administration, little if any end user interaction required, no quarrantine required, and an optional custom non-delivery receipt for all rejected messages. It uses a custom version of SpamAssassin along with many proprietary anti-spam techniques to achieve a guaranteed level of over 99% accurate spam detection with fewer than 0.1% false positives.
cw is a non-intrusive real-time ANSI color wrapper for common Unix-based commands. It is designed to simulate the environment of the commands being executed, so that if a person types 'du', 'df', 'ping', etc. in their shell it will automatically color the output in real-time according to a definition file containing the color format desired. It has support for wildcard match coloring, tokenized coloring, headers/footers, case scenario coloring, command-line- dependent definition coloring, and includes over 50 pre- made definition files.
mairix is a tool for indexing and searching email messages stored in Maildir, MH, or mbox folders. The index contains a map of which words occur in which parts of which messages. Searches on this index are fast and generate symlinks to the matching messages in a new Maildir or MH folder, or copies of matching messages in an mbox folder, which can be browsed normally in a mail client.
qpsmtpd is a flexible smtpd daemon written in Perl. Apart from the core SMTP features, all functionality is implemented in small "extension plugins" using the easy-to-use object oriented plugin API. qpsmtpd was originally written as a drop-in qmail-smtpd replacement, but now it also includes an smtp forward and a postfix "backend".
Apache SpamAssassin is an extensible email filter that is used to identify spam. Once identified, the mail can then be optionally tagged as spam for later filtering. It provides a command line tool to perform filtering, a client-server system to filter large volumes of mail, and Mail::SpamAssassin, a set of Perl modules allowing Apache SpamAssassin to be used in a wide variety of email systems.