Grammarly – $11.66 (if you pay $140) Use the free version with WordPress editor, which is pretty good. You can also write in their as well!
Hemingway – Pretty good free editor but it doesn’t change the active voice to passive voice
ProWritingAid – $50 a year
AirStory – this is copyhackers.com one and has headline generators.
CoSchedule Headline Analyzer
Google Docs to WordPress
Wordable from Grow and Convert – you can write in google docs and this will copy everything over