Adobe Acrobat Reader
Acrobat reader is a free application for viewing PDF files.

Open Office
Open Office is a complete open source alternative to Microsoft Office.

InfraRecorder
InfraRecorder is a nice program for Windows that lets you burn CD's and DVD's.

VLC Media Player
VLC Media Player is an alternative to Windows Media Player.

Mozilla Firefox
Firefox is a free internet browser alternative to Internet Explorer or Goggle Chrome.

Mozilla Thunderbird
Thunderbird is an free email client alternative to Microsoft Outlook. Plus with the Lightning add-on you can a full calendar feature that can sync with your Google or other public calendars.

CutePDF Writer
CutePDF Writer is a free tool that lets you print anything to a PDF file.

Malwarebytes
Malwarebytes is a free anti-malware program that uses advanced techniques to remove unwanted programs from your computer.
NOTE: This is free for personal use only.

AVG Antivirus
AVG Antivirus is a free Antivirus program that to keep your computer protected.
NOTE: This is free for personal use only.