Nanoshot is a free screenshot taking tool for Ubuntu.
Main features:
Take fullsize screenshots
Take screenshot of windows, including the active window screenshot
Take desktop screenshots
Take screenshots of web pages
Capture frames from video using Gstreamer and Mplayer
Upload screenshots to the popular image hostings
To install Nanoshot on Ubuntu 11.10
1.Open Terminal.To open terminal click the Dash home from unity launcher.And type terminal in the search field. And click Terminal.
2.Type the below code in terminal and hit enter.
sudo add-apt-repository ppa:nanoshot/ppa
3.Type your ubuntu password if needed.
4.Then press enter to continue or ctrl-c to cancel adding the ppa.
5.Type below command and hit enter
sudo apt-get update
6.Then type below command and press enter
sudo apt-get install nanoshot