Grammarly - Clear, effective, mistake-free writing everywhere you type.
Writing Prompts - Never run out of writing ideas again
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
Awesome ChatGPT Prompts - Game Genie for ChatGPT
Editsaurus - Highlights potential pitfalls in your writing to encourage good habits.
The Most Dangerous Writing App - If you stop typing, all progress is lost.