HowToForge.com is a website dedicated to providing step by step walk-throughs on many different Linux topics, from beginner to advanced. This includes anti-spam, security, networking, and virtualization just to name a few.
XML2CSV by A7Soft is a free command line XML to CSV converter for Windows. This utility can use elements of an XML structure as variables to quickly turn an XML file into a CSV report. The application includes usage documentation and a series of excellent examples.
The Electronic Frontier Foundation is a non-profit organization that works to protect digital rights and civil liberties. Their website contains lots of news and information about past, present, and future digital rights conflicts.
EFF has an excellent rating as a non-profit organization (see here).
AccessEnum is a free tool for Windows to view all the permissions set on a specific directory in a Windows environment. This tool helps locate variations and improper permissions set throughout a file system.
http://www.microsoft.com/technet/sysinternals/FileAndDisk/AccessEnum.mspx
The Group Policy Management Console is a great free plug-in for the standard Active Directory Management tool. It gives a clear and precise view of all the Group Policy Objects in the domain. It makes for easy modification and creation of GPOs.
Additional information and download link here:
http://www.microsoft.com/windowsserver2003/gpmc/gpmcintro.mspx