A selection of my favourite free software (freeware) for windows. If you bought commercial software to do these jobs it would cost over £500. These free alternatives are very good and I use them at home every day.
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AVG Free Antivirus
FoxitPDF Viewer - faster than Adobe PDF Reader and uses fewer
PrimoPDF - makes a PDF file from any type of file.
EditpadLite - better than Notepad
Jzip - like Winzip but free
Tree Size Free - Gives a breakdown of the usage of every directory on your computer hard drive including those used by other users on the same machine.
SyncBack Freeware - for backing up your files automatically to a second drive, even an external USB hard disk.
Open Office - free alternative to Microsoft Office, requires Java runtime
environment (also free)
Paint.net image editor - handles layers and has lots of filters available.
Real Alternative - simpler plug in codec for Real Audio and Real
AVS DVD Player - very good free DVD player for Windows. If you
can't get DVD's to play in Windows Media Player this will work instead.
Divx Player - plays divx files and installs the codec so you can play them in
Windows Media Player too.
DVD Flick - turns any video clip or collection of clips into a fully functional DVD with menus. Even burns the DVD.
Auto Screen Recorder Free - for making screen capture video recordings of activity on your computer screen.
Audacity - comprehensive audio recording and editing software with lots of effect plug ins, also does multi-track recording.
Free Rip - Rips audio files to MP3, WAV and several other formats
Electronic Piano - Play music from your qwerty keyboard using the midi synthesizer in your sound card.
Kompozer - WYSIWYG HTML editor for designing and building web sites.
Sam Spade for Windows - network tools like whois, ping and traceroute.
PuTTY - SSH and Telnet client.
Win SCP - FTP client