Free Usefull Softwares

Antivirus & AntiSpywares :

• Avast Antivirus 8 - Free Edition
• Avira Antivir Personal
• Spybot Search & Destroy 2.0

Browsers and Plugins:

• Google Chrome 27.0.1453.110 - Stable
• Mozilla Firefox v 21 - Stable
• Internet Explorer 10 for Windows 7 x86 (32bit)
• Internet Explorer 10 for Windows 7 x64 (64bit)
• Internet Explorer 8 for Windows XP
• Java Run time Environment (JRE) 1.7.0.21 x86 (32bit)
• Java Run Time Environment (JRE) 1.7.0.21 x64 (64bit)

Office and PDF Tools:

• Adobe Reader XI - Popular PDF Reader
• CutePDFWriter - A Free PDF Creator
• ApacheOpenOffice - A Free Office Suite

FireWalls and Security:

• COMODO Internet Security/Firewall - Internet Security with an option to install Firewall only - Very Good Firewall
• OutPost Firewall - Overall Very Good Firewall
• Peer Guardian 2 - A P2P anti spoofing/sneaking shield for Bittorrent Network

Benchmarking and other Tools

• CPU-Z - Know all about your CPU
• GPU-Z - Know all about your GPU
• Speccy - Know all about of your Hardware including Motherboard, Installed Memory, Disk, CPU, GPU and List of Drivers installed along with OS.

Optimizers and Unlockers:

• NTFS Access - To Access folders Restricted by System and Unlock them.
• Unlocker 1.9.2 - To Unlock Files Locked either by System or Viruses/Trojans.
• Auslogics Disk Defrag - Defragment Tools for Windows. 
• Defraggler - Another Disk Defragment tool for Windows .
• UltraDefrag (32bit) - To Defragment System files including Pagefile and Registry hives.
• UltraDefrag (64bit) - To Defragment System files including Pagefile and Registry hives.

CD/DVD Tools:

• Daemon Tools Lite - Free CD/DVD Image Mount tool with Emulation options. 
• WinCDemu - Virtual CD/DVD Image Mount tool without Restarting System.
• Ashampoo Burning Studio 6 - Free Version - CD/DVD Burning Suite similar to Nero.
• PowerISO 5.6 - FREE Version