Windows: Application launchers can speed up your computer experience, but they aren't always pleasant to look at. Krento is not only easy to configure, but it adds some serious 3D eye candy to your desktop, with little impact on resources.
Krento runs in the background from the system tray, and can be launched by either right-clicking the icon, clicking your mouse's scroll wheel, hitting Windows + C, or double-clicking a toggled "pulsar" — basically a small, semi-transparent animated icon — in the corner of your screen. To launch an program, just click on its box (or "stone", as Krento calls it). Or, if you don't want to move from the keyboard, you can also hit ctrl + the function key that corresponds to the program. In the above-pictured case, for example, Ctrl + F5 for the Command Prompt.
To add programs to the launcher, just drag and drop them onto a stone. You can even create multiple "circles" for different categories of programs, so you're not just limited to 12. Krento is also skinnable (it comes with a bunch of it's own skins, but is also compatible with RocketDock skins), and takes up very little RAM and CPU, which is always nice — especially for something that looks this good.
Krento is a free download, Windows only.