This page will be updated periodically as I think of more things to add. Note that I am not sponsored or affiliated with any of these products. Although I do personally use each and every one.
Probably my favorite grammar checking tool. It has quickly become popular with the free browser add-on, but the full tool is great for small punctuation mistakes and verb-age that you may need to fix. I’m a full time freelance writer and even I make mistakes. I’m human after all.
For those times when you don’t really feel like typing and the words just seem to flow out of your mouth. There are free options via Google Docs, but they don’t seem to perform as well as Dragon Naturally Speaking does.