Although Microsoft's OneNote is virtually tailor-made for pen input, we doubt most Windows fans would splurge on the likes of a Surface Pro just for the sake of a quick doodle or two. With the latest update to OneNote for Windows 8 and RT, they won't have to. The app refresh lets touchscreen PC users draw with their fingers using the same color and thickness options as their stylus-toting counterparts. The new input method won't be as precise as a pen, but it should do the job for simple diagrams or dusting off those kindergarten-era fingerpainting skills. Whether or not you're on a nostalgia kick, you can swing by the Windows Store today for the upgrade.