Windows

Windows

Auslogics Disk Defrag This is very useful for defragging in windows.

Download: http://www.auslogics.com/en/software/disk-defrag/download

CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system – allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it’s fast (normally taking less than a second to run) and contains NO Spyware or Adware!

Download: http://www.ccleaner.com

COMODO Internet Security is a lightweight anti-virus and firewall for protecting your system from any unwanted nasties trying to infect your system. Unlike AVG, the award-winning AV and firewall combination allow you to sandbox and completely personalise the scanner and protection settings allowing you to fine tune it to your own specifications. Along with a clean UI and some of  the best detection rates in the industry it’s crazy to go for any other free solution.

Download: http://www.comodo.com/home/internet-security/free-internet-security.php

Defraggler is a defragmentation program that can be used to defrag entire disks or individual folders and files etc.

Download: http://www.piriform.com/defraggler

ImgBurn is a lightweight CD / DVD / HD DVD / Blu-ray burning application that everyone should have in their toolkit!
It has several ‘Modes’, each one for performing a different task:
Read – Read a disc to an image file
Build – Create an image file from files on your computer or network – or you can write the files directly to a disc
Write – Write an image file to a disc
Verify – Check a disc is 100% readable. Optionally, you can also have ImgBurn compare it against a given image file to ensure the actual data is correct
Discovery – Put your drive / media to the test! Used in combination with DVDInfoPro, you can check the quality of the burns your drive is producing.

Download: http://www.imgburn.com

Notepad++ is a free source code editor and Notepad replacement that supports several languages. Running in the MS Windows environment, its use is governed by GPL License.

Download: http://notepad-plus-plus.org/download

Process Explorer is a an improved Task Manager  which brings many additional tools to the table. With a much more in-depth look at each of the processes and the ability to see which processes require which dlls to run or the icons, description and look at each individual process it is brilliant for tracking that unknown process hogging all your memory.

Download: http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx

VirtualBox is a free virtualisation tool which allows you to virtually install other operating systems within your Windows partition without affecting any of your other files. Virtual Machines are simple and easy to make and tweak once it has been created.

Download: https://www.virtualbox.org/wiki/Downloads

7-Zip is a file archiver with a high compression ratio.

Download: http://www.7-zip.org