1. Firefox / Chrome (Web Browser)

Both Firefox and Google Chrome is a good browser. Both are fast, easy to use and very safe. So, which do you choose? Most people memiilh Firefox because of the large selection of additional features that can be used by Firefox.

You can see all the features of Firefox in https://addons.mozilla.org/ . Additional features to Google Chrome also, but not as much as Firefox. See this article, 10 Best Features of Google Chrome .

2. AVG Anti-Virus (Anti-virus Software)
AVG Anti-Virus Free is a free anti-virus software is the most popular. And also the most frequently downloaded software according to Download.com website

Download AVG Free: http://free.avg.com/gb-en/homepage
Download AVG Internet Security (Free Trial): www.avg.com / gb-en / download
(For Windows OS)

3. Auslogics Disk Defrag (Disk Defragmenter)
This software is a free tool to keep your PC which is designed to cure system slowness and prevent damage caused by fragmentation. Windows already provides the software itself but Auslogics can do it faster.

Download: www.auslogics.com / en / software / disk-defrag / overview
(For Windows)

4. Advanced SystemCare Free (System Maintenance)
ACS Free provides an easy way to lay your computer to perform routine maintenance and system optimization pass.All into one to protect, clean, repair, and speed up your PC.

Download: http://www.iobit.com/advancedwindowscareper.html
(For Windows)

5. Security 360 (Spyware Removal)
New software coming from the same company with ACS. The goal is to protect your computer from spyware, hijackers, keyloggers and other things that like.

Although this is a new software, but has entered into the 10 most downloaded software in download.com, beating Spyware Search and Destroy.

Download: http://www.iobit.com/security360.html?Str=download
(For Windows)

6. IZArc (Universal Archiver / Extractor)
A tool to archive everything. You no longer need a separate program for ZIP, RAR, ACE, 7-ZIP, TAR, and so on, IZArc can handle it all.

Download: http://www.izarc.org/download.html
(For Windows)

7. Google Picasa Software (Photo Management)
Picasa automatically find all the photos on your PC, wherever they are, and organize everything in a matter of seconds. A good program to organize, edit, and view it on your computer.

With Picasa, not only can organize your photos but also can change the common problems, add beautiful effects and search for photos according to the person in the photograph. Download: http://picasa.google.com/ (Special for Windows, Mac , and Linux)

8. doPDF (PDF Printer)
Almost everyone wanted to change the file into PDF.doPDF is the easiest tool to do so. Using a virtual printer on your computer which you can choose at any program in Windows

Download: http://download.cnet.com/doPDF-Free-PDF-Converter/3000-18497_4-10648880.html
(For Windows)

9. Memento (Post-It Notes)
you've never heard of this program before. Memento is a simple note program for your desktop. This is better than the others because of its simplicity and very effective.

Download: http://www.guyswithtowels.com/downloads.html
(For Windows)

10. xVideoServiceThief (YouTube Video Downloader)
Almost every oranga open YouTube every day. And the fact that YouTube has more results than Yahoo is a good sign. The problem is you can not download videos from YouTube.

With this application, you can download as well as change the format of the video simultaneously.

Download: http://xviservicethief.sourceforge.net/index.php?action=downloads
(Special for Windows, Mac, and Linux)

11. Mozy (Backup)
Backups are very important. With Mozy, you can backup online and pick it back online as well.

Download Mozy (Free): https://mozy.com/registration/free/

Download Mozy (Unlimited): https://mozy.com/registration/unlimited/
(Especially for Windows and Mac)

12. Digsby (Multi-protocol Instant Messenger)
If chatting is your daily life, you need this program. This program is a program that provides all messenger chats in one application. So you do not need to use another messenger to chat with other people who have other e-mail address with you.

Download: www.digsby.com
(Special for Windows, Mac, and Linux)

13. VLC Media Player (Video Player)
VLC is a portable video player supports almost all kinds of audio and video and run almost all video. And it all does not require external codecs.

Download: http://www.videolan.org/vlc/

14. Foobar2000 (Music Player)
Foobar2000 is a music player for Windows and supports almost all kinds of audio formats.

Download: http://www.foobar2000.org/download
(For Windows)

15. ImgBurn (CD / DVD Image Burner)
This application is one application of CD / DVD / HD-DVD / Blu-ray simplest, fastest, free, and does not hamper the pace of your computer.