Of all the prominent features that came on the 10.5 Leopard update, the one I like and use the most is Spaces, a virtual desktop application. (There exist several of these for Windows as well, which accomplish the same thing.) Virtual desktops are designed for multitaskers, like myself, and find that I use Spaces more then any other application. In fact, I will have probably used it several times in the writing of the post. So, what is the point of these programs? As the name implies, these allow your to create a number of virtual desktops, each with its own application or applications running in it. This allows a seriously useful distribution and uncluttering of windows which I happen to love, as it allows me to just keep one thing in each space, access the desktop easily without sifting through 15 windows, and allow me to not have to keep track of what applications I have hidden or minimized. Below you can see what my desktops are without spaces and with it: