You might have seen the ads on TV or a preroll of a YouTube video. You might already know about it. But there's a plug-in and app for your computer that is fucking amazing for writing. Grammarly is a plug-in that you can put in Chrome and Firefox. It doesn't just spellcheck for you; it checks your grammar, sentence structure, and even tells you where you don't need a damn comma (although it's been wrong a couple of times with the comma thing), or a hypen, etc.

It's also an app you can write it, or copy and paste to/from. To my knowledge, I do not believe it acts as a plug-in for Office or OpenOffice, but it's easy to copy and paste to/from to check your shit. It'll even tell you when you can't figure the fuck out between thEn and thAn, which people seem to do a lot. (Plot twist: they aren't interchangeable; one is about time, one is a comparison.)

If you're ever writing to impress, or just be professional, Grammarly is your forever friend. I swear by it. It's a game every day to see how much I type and how little errors I can get. haha

Edit: It is free, although there is a paid version of the app that offers more. I've never found the need for it, but there is that option. There are no nag screens or anything that ask you to buy it.
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[Edited 11/16/16 12:54pm]

I need it.

I'm retired...

I don't have to give damn about grammar or grammatically speaking. My typing skills have always been horrendous, but I don't sweat that either.

============= see what I'm talkin' about

[Edited 11/16/16 16:29pm]