GNU enscript is a free replacement for the Adobe's enscript program. Enscript converts ASCII files to PostScript and spools generated PostScript output to the specified printer or leaves it to file.
Easy Graphic Converter is a powerful and easy-to-use graphic converter, image converter and thumbnails maker utility that can covert image files and make thumbnails.
With Signature Translator you're able to translate IDS signatures e.g. from Snort rules to Dragon rules and vice versa. There is also available common signatures standard (CIDSS - Common Intrusion Detection Signatures Standard).
pxview is a program to read Paradox database files. It is based on the pxlib library. pxview allows to output csv for reading with spread sheets, sql to import into a relational database, html and sqlite.
archivemail is a tool written in Python for archiving and compressing old email in mailboxes. It can move messages older than the specified number of days to a separate mbox format mailbox that is compressed with gzip, or optionally just delete old email.
Netpbm is a toolkit for manipulation of graphic images, including conversion of images between a variety of different formats. There are over 220 separate tools in the package including converters for about 100 graphics formats.