7 Zip - An open source, free alternative to WinZip

Audacity - open source software used for recording & editing audio files

AVG - Anti-virus and anti- spyware protection

CamStudio - Lets you record all screen & audio activity on your computer and create video files

FileZilla - Open source FTP program for uploading files to your host

Open Office - Open source office software - word processing, spreadsheets, databases, presentations ...

Roboform - Easily & safely manage your passwords

Textpad - A powerful text editor. I personally like Textpad for editing HTML code

GIMP - An open source program used to create & edit - free alternative to Photoshop

PDF995 - Use this tool to easily convert files to PSD format