Primarily used to generate plain text files with no styling or formatting, they can be used for a huge number of purposes from taking quick notes to editing websites or writing application code. Text editors are the unsung heroes of the Mac. Each week, the Friday Five takes a quick look at a Mac OS X or iOS app to point out five things you may have overlooked before. It’s the end of the week, but that doesn’t mean an end to learning more about your favorite Apple devices.