Anti-virus

	Avast! (alternative to Symantec or McAfee anti-virus)
	AVG (another good alternative anti-virus)
	Stinger (McAfee's Top 50 virus remover utility)
	Trend Micro House Call (online virus scanner)
	Windows Live Protection Center (another online virus scanner)

Backup

Bacula

Firewall

Comodo Firewall Pro

Hard Drive Utilities

	HDDGuru's Low Level Format Tool (works on most brands and types of HDs)
	LLFUTIL (IDE Hard Drive low level format utility)
	PC Activity Monitoring (need to know who's doing what on your computer?)
	PING (Ping Is Not Ghost... alternative to Symantec Ghost)
	SwissKnife (format external hard drives as FAT or FAT32)

Networking

	HP Web Jetadmin (manage HP network printers)
	iTALC (centralized workstation monitoring tool)
	OCS Inventory (client-server hard/software inventory database)☺
	SysInternals Suite (tools for nerds!)
	WPKG (automated software deployment for Windows)

Spring Cleaning

	ATF Cleaner
	CCleaner
	Duplicate Cleaner
	Regclean
	WinMerge

Spyware

	Ad-Aware (latest update file)
	FixEXE.reg
	HiJackThis (be VERY careful with this utility)
	Microsoft's Malicious Software Removal Tool
	Malwarebytes' Anti-Malware (best spyware remover IMHO)
	Rootkit Revealer
	SmitFraudFix
	Spybot - Search & Destroy

Windows "Enhancements"

	7-ZIP (alternative to WinZip)
	Autoruns (edit your system's startup list)
	CalcPlus (a beefed up calculator with conversions)
	FileZilla (FTP client)☺
	FreshUI (optimize Windows settings)
	LogiTech Mouse Driver (enhancement to your mouse)☺
	Microsoft: DirectX Updates WindizUpdate (Get Microsoft Updates via this alternative site)
	nLite (create unattended, modified Windows install CDs)
	NoteTab (NotePad replacement... using TABS for multiple files!)
	PuTTY (telnet/SSH client)
	StarDock's ObjectDock (create a MaxOSX-like Docking Bar)
	Windows XP Remote Desktop Connection (for those without XP)
	Windows XP Service Pack 3
	WinSCP (secure FTP/SCP client; requires PuTTY)
	WinToFlash (create a bootable USB drive to install Windows)
	WNTIPCFG (do you miss WINIPCFG from Win9x?  Here's the GUI for Win2K/XP)

Accounting

GnuCash (personal and small-business financial-accounting software)☺

Databases

	BlueDragon (alternative to ColdFusion)☺
	MySQL (alternative to SQL)☺

Earth & Sky

	Celestia☺
	Google Earth☺
	Microsoft Worldwide Telescope☺
	Stellarium☺

Internet

	Adobe Acrobat Reader (PDF file viewer)☺ DoPDF (create a PDF from any application, does NOT work with RDC) pdf995 (has both a printer and simple editor... works with RDC!) PremoPDF (create PDF files; has both 32- and 64-bit versions)
	Adobe Flash Player and Shockwave ☺
	AM-DeadLink (bookmark/favorite editor with weeding AND verification)
	Browser Archive (get old versions of most any browser) ☺
	Google Chrome (alternative to IE and Firefox) ☺
	IE multiple version installation (for website testing)
	Mozilla (home of Firefox, Camino, and others) ☺
	ooVoo (video chat/conferencing) ☺
	Pidgin (multi-protocol Instant Messaging client) ☺
	Sun Java (offline installer) (over versions) ☺ Check out JavaRa (prior version removal tool)
	Thunderbird (e-mail client)☺ Lightning (calendar component for Thunderbird)☺
	WebEx Manager/Player (for those needing to join/view a WebEx session)☺

Multimedia

Audio

	Audacity (audio editor)☺
	Audiograbber (Audio CD Extractor)
	CDex (Audio CD Extractor)
	Exact Audio Copy (Audio CD Extractor)
	LAME MP3 Encoder (links to various versions only)☺
	MP3Tag (MP3 tag editor)
	TuxGuitar (GarageBand-like music creation program)☺

CD-DVD

	BurnAware (CD, DVD, Blu-ray Disc burning software)
	DVD Flick (DVD authoring with many codecs preinstalled)
	DVD Shrink (DVD ripper)
	DVD Styler (DVD authoring)
	DVDx (DVD to multiple video file formats... reverse DVD Flick if you will)
	ISORecorder (right-click a CD/DVD to create an ISO or vise-versa)

Conversion

	avi2DVD converts avi/ogm/mkv/wmv to DVD/SVCD/VCD
	Media Convert is an online conversion site with a wide variety of formats including ring tones.☺
	Zamzar lets you convert many different types of files. These include documents, music, images, video, and compressions.☺

Photo Editing, Animation, Design, and 3-D Modeling

	Art Weaver (Corel Draw alternative)
	Blender (Maya alternative, requires Python be installed)☺
	Creative Docs .NET (Illustrator alternative)
	Dia (draw structured diagrams)
	Easy Thumbnails (thumbnail creator)☺
	GIMP (picture editor)☺ GIMPShop (Adobe Photoshop skin for GIMP)☺
	High Quality Photo Resizer (batch resizing plus 37 effect add-ons)
	Inkscape (vector graphics editor like Illustrator or CorelDraw)☺
	IrFanView (picture editor)
	Paint.NET (Photoshop alternative)
	Pencil (traditional animation software)☺
	Tux Paint (drawing program for grade school children)☺

Video

	Avidemux (editor designed for simple cutting, filtering and encoding)☺
	CamStudio (create screen-capture videos for training end-users)
	Jahshaka (video editing, effects, and compositing suite)☺
	K-Lite Codec Pack (a very complete codec pack)
	MediaCoder (universal audio/video batch convertor)☺
	QuickTime (Apple's multimedia player)☺
	VLC Media Player (multimedia player... if this program can't play it...)☺
	WinDV (simple FireWire video camera capture app)

Office Suites & Desktop Publishing

	Converting Works/WordPerfect to Word (install in this order): Works Converter Works 2000 Converter Office Converter Pack Office 2007 Compatibility Pack Office 2007 Compatibility Pack SP1 Microsoft Works 6–9 File Converter
	OpenOffice (alternative to Microsoft Office)☺
	Go-oo (OpenOffice distro with additional import filters, improved GUI)☺
	Scribus (Open Source desktop publishing)☺

Programming & Game Development

	Dev C++ (alternative to Microsoft Visual C)
	wxDevC++ (alternative to Borland C++ Builder)
	Eclipse (MUCH more than just a Java IDE)☺
	GoldenDict (a feature-rich dictionary lookup program)☺
	Lazarus Project (alternative to Borland Pascal/Delphi)☺
	Miscellaneous Mathematical Utilities ☺
	Netbeans ("The only IDE you need!")☺
	Sandbox RPG (open source RPG game development)☺
	Scirra (DirectX game development in a WYSIWYG environment)

Website Development

	Microsoft's Visual Web Developer
	NVU (alternative to FrontPage or Dreamweaver)☺
	Drupal (open source content management system)
	Screen Capture Tool (need more than ALT/CTRL+PrtScn?)

	Byte Converter (online K/KB/MB/GB converter)☺
	ConvertMe (online data transfer rate converter)☺
	Ziskocalc (Decimal- Binary, IP-HEX, and Subnet calculator)

A list of known file extensions

File Extensions

Port List References:

	Dave's Port List (simply THE best list of frequently seen TCP and UDP ports)
	Network ICE Port List
	IANA's Port List (poorly displayed, but up-to-date)