XP / Vista Very Useful Software (Software Free Unless Otherwise Noted)

Category	Name	Comment	Link
Security	Spybot*	Use when you get malware!	Link
Security	Microsoft Windows Malicious Software Removal Tool	"The Microsoft Windows Malicious Software Removal Tool checks computers running Windows Vista, Windows XP, Windows 2000, and Windows Server 2003 for infections by specific, prevalent malicious software—including Blaster, Sasser, and Mydoom—and helps remove any infection found."	Link
Security	Windows Defender	"Windows Defender is software that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software by detecting and removing known spyware from your computer.."	Link
Back-up	Acronis True Image ($50)	"Acronis True Image 11 Home provides the maximum flexibility to ensure you are adequately protected and can recover from unforeseen events such as viruses, unstable software downloads, and hard drive failures."	Link
Web Development	Core FTP	"This free, secure FTP client gives you a fast, easy, reliable way to update and maintain your website via FTP."	Link
Web Development	KompoZer	"KompoZer is a complete web authoring system that combines web file management and easy-to-use WYSIWYG web page editing."	Link
Web Development		Has many features of Photoshop, easy to use, and requires less computer resources.	Link
Web Development		"Come to discover XnView, a software to view and convert graphic files, really simple to use ! Support of more than 400 graphics formats ! It's free, so do not hesitate!"	Link
Computer Management		"The Belarc Advisor builds a detailed profile of your installed software and hardware, missing Microsoft hotfixes, anti-virus status, CIS (Center for Internet Security) benchmarks, and displays the results in your Web browser."	Link
Browser	Google Chrome	Phishing and Malware protection.	Link
Drivers	NVIDA Drivers	Tool to detect correct driver for your PC.	Link

I also am adding  miscellaneous "useful downloads"