Google Docs' web fonts.

If you haven't noticed, Google has added a ton of web fonts which you can use, as soon as you add them to your font list.

To add new fonts to your font list, just click on the font menu tab, then select the bottom-most menu item, Add fonts.

This brings up a new pop-up window, where you can select fonts on the left side, with your installed fonts on the right.

Easy breezy.