Talika is a GNOME Panel applet that lets you switch between open windows using icons.
So what's new in Talika 0.50? The most important changes have been made to the icons such as custom icons for the launchers (right click a launcher (pinned app), and select "Change icon)), better default icons, option to use monochrome icons and so on. The "Pin" feature has also received a lot of attention and you now have pin options for pinnable applications, support for pinning apps via drag and drop and better pinning support for OpenOffice and WINE apps.
Other changes in Talika 0.50 include options to show tasks from multiple monitors, lots of new UI customization options and many more.
Like you probably know, because Talika doesn't have an official Ubuntu PPA, we maintain one and the new Talika version has already been uploaded to the PPA so Ubuntu users (Karmic, Lucid and Maverick) can easily install Talika 0.50 using the following commands:
sudo add-apt-repository ppa:webupd8team/talika
sudo apt-get update
sudo apt-get install talika
Talika 0.50 is also available in the main WebUpd8 PPA.
If you're not using Ubuntu Karmic, Lucid or Maverick or not using Ubuntu at all, you can download Talika from HERE.