Ad-Aware
http://www.lavasoftusa.com/
d-Aware is designed to provide advanced protection from known Data-mining, aggressive advertising, Parasites, Scumware, selected traditional Trojans, Dialers, Malware, Browser hijackers, and tracking components. With the release of Ad-Aware SE Personal edition, Lavasoft takes the fight against Spyware to the next level.


F-Secure Client Security 2008
https://store.f-secure.com/cgi-bin/dlreg/ml=EN?ID=FSISTB&desid=TRIAL
All in one solution for your PC. F-Secure Internet Security 2008 with integrated antivirus, antispyware and firewall functions ensures your PC has the best protection against hackers, viruses, spyware and even stealth threats that use special rootkit-techniques. Parental Control with a web surfing time lock enables parents to have full control over their children's Internet usage, ensuring that they cannot access inappopriate content. Download a free 30 day trial and see the all in one data security solution for your PC!


FireFox
http://www.mozilla.org/products/firefox/
The award-winning Web browser is now faster, more secure, and fully customizable to your online life. With Firefox 2, we’ve added powerful new features that make your online experience even better.


IPCop
http://www.ipcop.org
IPCop Linux is a complete Linux Distribution whose sole purpose is to protect the networks it is installed on. By implementing existing technology, outstanding new technology and secure programming practices IPCop is the Linux Distribution for those wanting to keep their computers/networks safe.


Open Office
http://download.openoffice.org/2.3.1/index.html
Mission Statement To create, as a community, the leading international office suite that will run on all major platforms and provide access to all functionality and data through open-component based APIs and an XML-based file format.


Shoot the Messanger
http://www.grc.com/stm/shootthemessenger.htm
The Windows "Messenger Service" is being exploited to spray the Internet with unsolicited commercial eMail. The receipt of a single UDP packet can cause a "Messenger Service" dialog to pop-up on the user's screen. It is possible for the sender to "spoof" (falsify) the packet's "Source IP", making these packets impossible to trace back to their origin. If our experience with eMail Spam is any model, we can expect to see a lot more of this in the future.


SpyBot Search and Destroy
http://www.safer-networking.org/en/spybotsd/index.html
Spybot - Search & Destroy can detect and remove spyware of different kinds from your computer. Spyware is a relatively new kind of threat that common anti-virus applications do not yet cover. If you see new toolbars in your Internet Explorer that you didn't intentionally install, if your browser crashes, or if you browser start page has changed without your knowing, you most probably have spyware. But even if you don't see anything, you may be infected, because more and more spyware is emerging that is silently tracking your surfing behaviour to create a marketing profile of you that will be sold to advertisement companies. Spybot-S&D is free, so there's no harm in trying to see if something snooped into your computer, too :)


Thunderbird
http://www.mozilla.org/products/thunderbird/
Thunderbird makes emailing safer, faster, and easier than ever before with the industry's best implementations of features such as intelligent spam filters, built-in RSS reader, quick search, and much more.


Trend AV Housecall
http://housecall.trendmicro.com/
Free online scan of your computer for viruses.


Trillian
http://www.ceruleanstudios.com/learn/
Trillian is a fully featured, stand-alone, skinnable chat client that supports AIM, ICQ, MSN, Yahoo Messenger, and IRC. It provides capabilities not possible with original network clients, while supporting standard features such as audio chat, file transfers, group chats, chat rooms, buddy icons, multiple simultaneous connections to the same network, server-side contact importing, typing notification, direct connection (AIM), proxy support, encrypted messaging (AIM/ICQ), SMS support, and privacy settings. Without stealing your home page and with no other included software, pop-ups, or spyware, Trillian provides unique functionality such as contact message history, a powerful skinning language, tabbed messaging, global status changes (set all networks away at once), Instant Lookup (automatic Wikipedia integration), contact alerts, an advanced automation system to trigger events based on anything happening in the client, docking, hundreds of emoticons, emotisounds, shell extensions for file transfers, and systray notifications.


UnPlug n' Pray
http://www.grc.com/unpnp/unpnp.htm
The Universal Plug and Play service (UPnP), which is installed and running in all versions of Windows XP — and may be loaded into Windows 98 and ME — essentially turns every one of those systems into a wide-open Internet server. This server listens for TCP connections on port 5000 and for UDP 'datagram' packets arriving on port 1900. This allows malicious hackers (or high-speed Internet worms) located anywhere in the world to scan for, and locate, individual Windows UPnP-equipped machines. Any vulnerabilities — known today or discovered tomorrow — can then be rapidly exploited.