WINDOWS ONLY SOFTWARE
IranView

Free Easy Burner (free)

Cobian Backup (free)

CCleaner (free)

Windows Vista Upgrade Advisor (free)

Window Blinds (free for 60 days; $19.95)

Desktop Sidebar (free)

Yahoo Widgets (free) 

Boot Skin (free)

Bonjour for Windows (free)

AVG Anti-Virus Free Edition (free)

AVG Anti-Spyware Free (free)

Advanced Windows Care Personal (free) provides the more essential and practical formula for
        Windows: Removing Spyware and Adware, Preventing Security Threats, Privacy Protection, Fixing
        Registry Errors, Temporary Files Cleanup, Startup Cleanup, Repairing Windows,and Speeding up
        System

WINDOWS AND MAC SOFTWARE
Pando (free)

iTunes (free)

Airfoil ($25)

Adobe Acrobat Reader (free)

Adobe Flash Player (free)

QuickTime Player (free)

Windows Media Player (free)

RealPlayer (free)

OpenOffice (free) Don't have Word or any part of Microsoft Office? Here is the free (MS Office look-alike)
                    program which is compatible with other major office suites, There are 6 components:
         Writer – a word processor you can use for anything from writing a quick letter to producing an entire book.
         Calc – spreadsheet to calculate, analyse, and present data in numerical reports or sizzling graphics.
         Impress – create effective multimedia presentations.
         Draw – produce simple diagrams to dynamic 3D illustrations.
         Base – manipulate databases seamlessly.
         Math – create mathematical equations with a graphic user interface.

ZDNet Downloads (free) One of the best (and safe) download sites for freeware and shareware software for
         both windows and mac computers.