Handy programs for scripting on OS X

MacOSX::File - A collection of Perl modules to manipulate files on MacOS X (set file/creator codes, copy files while preserving the resource fork,etc.)
Installing on Panther resulted in a "gcc2" error when trying to install from CPAN. Manually still required a tweak even though the latest version has a patch for Panther:

curl -O http://search.cpan.org/CPAN/authors/id/D/DA/DANKOGAI/MacOSX-File-0.71.tar.gz tar zxvf MacOSX-File-0.71.tar.gz cd MacOSX-File-0.71 perl Makefile.PL make CC=gcc3 make test sudo make install
osxutils is a bundle of powerful Mac-oriented command line utilities for viewing, editing and manipulating file meta-data. The package contains 'lsmac', a popular alternative to the BSD list command, in addition to many other useful tools.
Download osxutils1.7.pkg.zip, the most recent version. Yes, it's old (from 2007) and is made for PPC but that's what I needed! An Xcode 2.2 package is available too - maybe it can be compiled on Intel Macs and newer versions of OS X?
Mac::Macbinary - Perl module for handling Macbinary files (.bin) though never got it to work quite right with files decoded for OS 9.
Macbinconv - Mac binary format converter. Supported binary formats include: native, datafork+resourcefork file, applesingle, macbinary, services for macintosh.

Recent Updates

SquidGuard

SquidGuard is a URL redirector used to use blacklists with the proxysoftware Squid. There are two big advantages to squidguard: it is fast and it is free.
NCurses Disk Usage

A disk usage analyzer with an ncurses interface, aimed to be run on a remote server where you don't have an entire gaphical setup, but have to do with a simple SSH connection. ncdu aims to be fast, simple and easy to use, and should be able to run in any minimal POSIX-like environment with ncurses installed.
WPKG

WPKG is an automated software deployment, upgrade and removal program for Windows.

It can be used to push/pull software packages, such as Service Packs, hotfixes, or program installations from a central server (for example, Samba or Active Directory) to a number of workstations.

It can run as a service to install software in the background (silent install), without user interaction.

It can install MSI, InstallShield, PackagefortheWeb, Inno Setup, Nullsoft, other software installers or .exe packages, .bat and .cmd scripts and similar: no more repackaging to perform software installation.

WPKG is open source software.
opsi

opsi (Open PC Server Integration) the Open Source client management system
Vagrant

Vagrant is a tool for building complete development environments. With an easy-to-use workflow and focus on automation, Vagrant lowers development environment setup time, increases development/production parity, and makes the "works on my machine" excuse a relic of the past.