Task Dock Applet for gnome-panel organizes open windows in icons, just like Windows 7. To see what I mean, take a look at the screenshot below:
To install it in Ubuntu, simply download and double click the .deb package from HERE.
For other Linux distributions, download the source files from HERE, then:
1. Untar the archive
2. Navigate from terminal to the carpet
For other Linux distributions, download the source files from HERE, then:
1. Untar the archive
2. Navigate from terminal to the carpet
cd taskdock-0.0.1
3. Typesudo make
4. Restart gnome-panelkillall gnome-panel
5. And finally just add Taskdock to the panel and its working