Avast Antivirus – www.avast.com/eng/download-avast-home.html
Free antivirus software providing desktop security and data protection. avast! detects and removes all forms of malware, including spyware, rootkits and trojans. Free for home users.
Spybot Search and Destroy - www.safer-networking.org/en/mirrors/index.html
Spybot Search & Destroy is an anti-malware application designed for on-access and on-demand scanning and removal of various kinds of malware, including spyware, adware, hijackers and trojan horses.
OpenOffice.org – download.openoffice.org/other.html#en-US
OpenOffice.org 3 is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose.
Ubuntu Linux – www.ubuntu.com/getubuntu/download
Ubuntu is a community developed operating system that is perfect for laptops, desktops and servers. Whether you use it at home, at school or at work Ubuntu contains all the applications you’ll ever need, from word processing and email applications, to web server software and programming tools.
MX Guard Dog - www.mxguarddog.com
MX Guard Dog is a cheap SPAM and Antivirus scanner that your organisation can use. It is based in the cloud and will filter all of your messages before they reach your mailserver or PC.