Helios qmail is an advanced qmail distribution
based on qmail-sql. It has SMTP, SMTPS, POP3,
POP3S, IMAP, and IMAPS services, a content
scanner, antispoof and SPF support, SMTP-AUTH,
SMTP-after-POP/IMAP, a PHP5 API, and many other
QtFprot is a frontend for FPROT 4.x, a free (for personal use) Linux virus-scanner. It's similar to XFprot, but written in Qt. It allows you to set all FPROT paramters with a comfortable GUI.
A lightweight PHP image board.
A checking tool for gettext POT, PO, and MO files.