What utilities do you use on your machine?

[Khoal]

Just a kind of listing, nothing more. I'll go first.

Antivirus: Bit Defender
Firewall: Default WinXP + Bit Defender
Registry & Disk Maintenance: TuneUp Utilities 2006
Email: Gmail
Instant Messaging: GAIM
Office/Productivity: MS Office 2003
BitTorrent: Azureus
Browser: Avant Browser
Spyware Remover: Ad-Aware, Spybot Search & Destroy
Media Players: Media Player Classic, VLC, Winamp

Edit: added some additional utilities...

[Chaldor Itieles]

Well, If u ask

Antivirus: F-Secure 2005
Firewall: Outpost Prof. 3
Registry & Disk Maintenance: Regedit, O&O Defrag
Email: Thunderbird
Browser: Firefox 1.5
Instant Messaging: Miranda-IM
Office/Productivity: MS Office 2003; Open Office 2
BitTorrent: none
Spyware Remover: Firewall and Antivirus have both tools for it; also working with reduced rights on my maschine
Media Players: Winamp
Grafics: Photoshop CS
Coding/Develloping: Eclipse 3.2 (love all those plugins), Dev C++, Linux on Notebook with Kate, pico, MC
HTML/PHP: AceHTML 6, Notepad

[Ssilmath]

Antivirus: None (I know, I'm bad)
Firewall: Windows Default
Registry & Disk Maintenance: No clue
Email: Yahoo
Browser: Microsoft Internet Explorer
Instant Messaging: Yahoo IM
Office/Productivity: None
BitTorrent: none

[Varangaard]

Let's see....

Antivirus: none (though I run Ewido and Stinger now and then)
Spyware blocker: Ad-Aware, Spybot Search&Destroy, Hijackthis
Firewall: Sygate
Registry maintenance: none
Disk maintenance: Diskeeper
Email: Thunderbird
Browser: Firefox
Instant Messaging: none
Office: MS office XP installed from relatives' CD (used so rarely I wonder why I bother having it around)
P2P: BitTornado, DC++
IRC: mIRC
Graphics: Photoshop
Audio: Winamp
Video: BSPlayer, Zoomplayer, CCCP codec pack
HTML/PHP Coding: Notepad, running them on Apache2, MySQL5, PHP5

[AA0]

Antivirus: AVG.. only occasionally, you need to be pretty bad to actually get infected
Firewall: Default WinXP + hardware router
Registry & Disk Maintenance: Speeddisk
Email: Eudora
Instant Messaging: Nobody likes me
Office/Productivity: I'm not productive.. I'd probably use FreeOffice
BitTorrent: none
Browser: Opera
Spyware Remover: Ad-Aware
Media Players: Winamp

[Amadan]

Antivirus: Occasionally I go to http://www.antivirus.com and scan. Haven't found a virus yet.
Firewall: WinXP + hardware router
Registry & Disk Maintenance: Defrag!
Email: Gmail, Personal Website e-mail
Instant Messaging: AIM, MSN, Yahoo(hardly ever), ICQ, Xfire
Office/Productivity: Office XP
BitTorrent: ABC Torrent
Browser: IE
Spyware Remover: Ad-Aware
Media Players: Winamp

[Kelsaka]

Antivirus: Norton Internet Security
Firewall: Default WinXP, I think our cable box provides one too
Email: Google, Yahoo
Instant Messaging: Y!M
Office: MS Works (pc) MS Office X (iBook)
BitTorrent: Azureus (pc)
Browser: IE (pc) Safari (iBook)
Media Players: iTunes (iBook)
Graphic Programs: Painter 9, Paint Shop Pro 6, Photoshop 7

[Ahael]

Ok, here I go:

Antivirus: F-Secure AV 2006
Firewall: A hardware VPN firewall
System Maintenance: Regedit, chkdsk (yeah, I'm old school I guess), CCleaner
Email: Pine & my ISP's webmail
Instant Messaging: MSN Messenger
Voice comm: Ventrilo
Office & Productivity: OpenOffice 2
Graphics: Photoshop Elements, IrfanView
P2P: none
Browser: Firefox 1.5
Anti-spyware: Spybot Search & Destroy
Web filter: Mozilla Adblock, Proxomitron (a proxy filter) - no annoying ads for me
Video Players: Windows Media Player, Media Player Classic
Audio player: Winamp
HTML: Notepad, pico
FTP: FileZilla
IRC: Visual IRC

[Dragoniade]

Anti-Virus: Norton
Firewall: A good linux box, so masquerade.
Email: Thunderbird
Browser: Firefox
Music player: Winamp 5
Video player: Windows Media Player 6.4
Video Editor: Virtualdub
Video Capture: avi_io
Graphic: Paint Shop Pro 7
IRC, ICQ, AIM, MSN, Y!: Trillian
FTP: SmartFTP
Text, HTML: Edit Plus
Coding/Develloping: Eclipse 3.1 with a couple of plug-ins; Hibernate, apache2, postgreSQL, mySQL, PHP
HZ Patcher: My own

[Dotcher]

Antivirus: Usually none, but Trend HouseCall on occasion
Firewall: Hardware NAT box
Registry & Disk Maintenance: Defrag
Email: Thunderbird
Instant Messaging: Trillian
Office/Productivity: MS Office 2003
BitTorrent: BitTornado
Browser: Firefox
Spyware Remover: Ad-Aware
Media Players: Winamp, VLC, Media Player Classic
SSH/Telnet: PuTTY
IRC: mIRC
File Transfer: WinSCP, SmartFTP
Code Editors: Komodo, SciTE, gVIM, MS Visual Studio 2003/5

[Blue Hasia]

Ok, here I go:

Antivirus: Norton
Firewall: software and hardware
System Maintenance: Regedit, chkdsk, CCleaner
Email: Gmail and personal web site
Instant Messaging: none
Multimedia software:
Macromedia Flash, 3d Max 8, Poser 6, Maya 7, Bryce 5.5, Director, PS CS 2, after Effects 6.5, Premiere Pro 1.5, Illustrator CS 2, DVD Encore 1.5, Adobe Audition's 1.5 Pro, Macromedia Dreamweaver,
P2P: none
Browser: Internet explorer
Anti-spyware: Spybot Search & Destroy, lava soft
Web filter: GMail block up Popper (it really works)
Video Players: Windows Media Player,
HTML: Notepad

[Ariadne]

just going to add a music station...

www.last.fm

download their free player and type the name of artists you like, it will find similar ones (or ones that it thinks are similar, sometimes the links are tenuous to say the least!) and it supposedly learns your taste. I've been quite impressed by it

[Menkure]

The two most helpful I've found thus far, which are freeware (and have not been mentioned yet) are:

WinDirStat: Handy utility that gives you a gorgeous and easy-to-work-with display of your files, showing exactly what's eating up your drive space

Foxit PDF Reader: Free PDF reader, which is only about 1 MB in size. It opens almost instantly, and doesn't have the %#@%^& Adobe Gamma thing running in the background.

Very handy utilities that I've found.

-Menkure