Lookit Screenshot Uploader is a free screen capture tool for taking screenshots on Ubuntu. The tool allows to capture a selected area on your screen, entire screen, or active window. The taken screenshots can be then saved to your computer or uploaded to an FTP/SSH server, or shared on Imgur, Omploader, or CloudApp.
To install Lookit Screenshot Uploader on Ubuntu 11.04/10.10/10.04, launch the Terminal and issue these commands:
sudo add-apt-repository ppa:lookit/ppa
sudo apt-get update
sudo apt-get install lookit
After launching the tool, its icon will appear in the notification area, click it and select an action.