I find it much faster to identify a window in the taskbar (window list) by its icon,
rather than by its text:
The problem with most window managers I've switched among is that they don't group windows, and if you have more terminals or file managers, they'll just clutter the taskbar and you won't know which is which. Windows 7 offers a relatively elegant solution to this by grouping similar window icons together.
Question: What Linux window managers (or desktop environments) have this functionality? If addons exist that provide it, that's alright.
For reference, a Cinnamon applet that sort of does this is Window List With App Grouping.