Talika is a GNOME panel applet that lets you switch between open windows using icons, similar to DockBar or DockBarX.
Talika .deb files are available, but not a PPA to stay up to date. Because I got lots of emails to create a PPA for Talika, here it is:
sudo add-apt-repository ppa:webupd8team/talika && sudo apt-get update
Then install Talika with:
sudo apt-get install talika
And finally, add the Talika applet to a GNOME panel.
The PPA currently maintains Talika for Ubuntu 9.10 Karmic Koala, 10.04 Lucid Lynx and 10.10 Maverick Meerkat. Talika is also available in the WebUpd8 PPA - all the packages we maintain will also be available in the WebUpd8 PPA.