pdfcrypt allows you to set permissions on a PDF file. For example, you can publish a document without permitting users to print it. The button to print the file will be disabled in the Acrobat Reader application. It can be used as a batch application to set permissions on a large group of PDF files, or as a filter in a Unix pipeline, or within a CGI application. Only binary executables are distributed, but the original Perl source code may be requested.
The pilot-link suite of tools contains a robust library and a series of conduits for moving information between your desktop or workstation and your Palm handheld device, such as those made by Palm, Sony, Handspring, Handera, and others. It also includes language bindings for languages such as Perl, Python, and Java.
dirgroup is a Perl script for merging the contents of a directory, /etc/group.d, into the file /etc/group. Storing group information in a directory allows users other than root to own and manage Unix groups. This minor change to Unix permission semantics provides many of the advantages of much more complex ACL systems.
The NNGS (No Name Go Server) is a full-featured server which allows you to play the game of Go over the Internet. It runs on Unix machines as well as on Windows, and supports connections from many clients (both graphical and text based). The code is based on the Free Internet Chess Server (FICS) code, and currently only supports the game of Go.
Foomatic is the printer/driver database of Linuxprinting.org. The XML-based system integrates free software printer drivers with all common spoolers (CUPS, LPRng, LPD, GNUlpr, PPR, PDQ, CPS, etc.) in UNIX. It generates Adobe-compliant PPD files which, together with the foomatic-rip filter script, allow easy setup of print queues with access to all driver options. Foomatic ships with every major Linux distro and its Web site is used as a reference by vendors. It is an up-to-date and distribution-independent repository of printer and driver data, scripts, and utilities, accompanied by the wealth of knowledge, tips and tricks, solutions, and enlightenment provided by its newsgroups.