Easy YouTube Video Downloader (Firefox Addon)

This will help you download your favourite video as
 M4A
 AAC
 MP3
 MP4 
 FLV
 MPEG 
 files from best available quality to lower qualities very easily.
This also can create MP3 files out of the youtube video directly without spoling the quality.
Dowload for your Firefox from
https://addons.mozilla.org/en-us/firefox/addon/easy-youtube-video-downl-10137/

Best Free Image Processing Software : Gimp

GIMP is the most popular open-source and free image editor available. It has some features available for Photoshop and interfaces also looks like Photoshop.This is available for Windows, Unix as well as OS X.
You can download it from 
http://www.gimp.org/downloads/