If you haven't used Screenlets in your Ubuntu yet, it is an excellent application to experiment with. And hundreds of useful third party user contributed screenlets are available for free. Here is a quick review of some of the best user contributed screenlets available for Ubuntu GNOME.
Install Screenlets Manager
Before getting started, you need to install screenlets manager first. It is available in the default ubuntu repositories. Just search for 'screenlets' in Ubuntu Software Center or simply do the following in terminal.
sudo apt-get install screenlets
Now, you can access screenlets manager from Applications - Accessories - Screenslets. It consists of a good number of screenlets as default. Lets start reviewing useful user contributed screenlets available among others.