My best choices of free software

Day by day, a lot of software has been developed to make our daily’s job more easier. Although the purpose of software has been developed are for sell but also have among of developers just gave it for free. Although it is free but it is functioning as good as paid software. The following is my favourite free software:

Internet Browser
Mozilla Firefox
Google Chrome

Operating system
Ubuntu
Thinkgos

Compressing tool
7-Zip

Office
Open office
Adobe PDF
Google doc

Messaging
Yahoo messenger
Skype

Multimedia
Audacity
Winamp

Antivirus/antimalware
AVG
Hijackthis

Imaging
Irfanview

Developer tool
Notepad++
Netbean

If you found out more useful free tools please share here.