Do you have the start of your novel in a Google doc? A note on your phone? Or perhaps you spent the first week of NaNoWriMo meticulously organising an empty outline in Scrivener? Here are some of the writing tools that amateur novelists swear by.
Mac: Hemingboard began as an iOS keyboard that works like an amped-up thesaurus, not only suggesting synonyms to whatever you're typing, but also rhymes and similar-sounding words that you can use as puns. Now they have brought their wordplay weaponry to your desktop.