Download any YouTube video across the web with a single click from Firefox using Fast YouTube Firefox Addon.It supports downloading video’s in FLV, High-Quality MP4 (iPod), HD (High Definition) and 3GP video formats.

Automatically Extract and download the audio of video files as MP3 Files from popular video sites like YouTube,MyVideo, Clipfish, Sevenload, Dailymotion, MySpace from Firefox using Video2Mp3 Addon or online at Video2MP3.net

Search, download and convert videos from Youtube, Google Video, Metacafe, MySpace, DailyMotion, and many other similar sites from your desktop and save them in AVI or MPG format using VDownloader.

Create Closed Captions or Sub Titles to any YouTube Videos online at CaptionTube, which is free online webtool powered by Google App Engine.The created closed subtitles can also be downloaded, emailed or exported to YouTube Format.

Sprink is a portable YouTube Client that lets you search and watch YouTube Video right from your desktop.

YouTubeReloaded is a free YouTube playlist generator that creates a playlist from YouTube Videos that you can share with by embedding it in your blog/website.

Google has recently started offering HD versions of the videos on YouTube, but you cannot download the HD Videos from YouTube.Here’s how you can download HD videos off Youtube.

TubeChop that lets you cut YouTube Videos online where you can chop the videos and share the chopped videos using the unique TubeChop URL and also embed the chopped video using the embed code.