Sepllchecking. I mean, spellchecking: it’s such an integrated part of our word processing and email workflow these days that we feel ripped off when an application (or phone…) doesn’t have it built-in. Sadly, grammar-checking is a little bit behind. Checking words against a dictionary is trivial, but picking out parts of speech and sentence structure is trickier. Some proprietary office suites include grammar tools built-in, although the free software suites do not. But there are plug-ins available that bring grammar and stylistic help to all of the major open source word processors.