Windows only: If there's only a few things most Microsoft Vista upgraders and naysayers can agree upon, one likely talking point is that Vista's fonts are generally clean, smooth, and a step up from XP. Getting the newer fonts in XP doesn't have to involve illegal downloads and system tweaking, however—as the gHacks tech blog points out, simply installing Microsoft's PowerPoint Viewer 2007 installs a bundle of Vista fonts in XP that you can use as your system defaults. Once installed, head to your display properties, then hit the Appearance tab to select a system-wide font. You'll also want to enable ClearType, which, luckily, we've covered before. PowerPoint Viewer 2007 is a free download for Windows only.
PowerPoint Viewer 2007 [Microsoft via gHacks]