For my novels, I use Google Docs for saving chapters and summaries. I use Grammarly for simple grammar and punctuation mistakes and hints (it's free but for a more advanced version you have to pay $20ish dollars), I also use Evernote for planning, and finally, I use Google Sheets so I have a decent flow and summary of plot as well as a list of characters, places, and extra information.
I prefer the Google versions of word & excel because they're free to use and it doesn't take up space on my computer since there's also Google Drive, plus it's easier for me to find things. Grammarly was a recent discovery that a friend recommended to me and it's helped a lot with mistakes. Evernote keeps a lot of my school notes and so I decided to just put my stories in there.