Grammarly - Clear, effective, mistake-free writing everywhere you type.
Power Thesaurus - Power Thesaurus is a fast, comprehensive and easy-to-follow online thesaurus for writers...
Linguix - AI-enabled writing tool for writers, editors, and businesses
Writefull Thesaurus - A Google Docs add-on that uses AI to give you synonyms
FoxType Thesaurus - Visualize similar words for _____
Reverse Dictionary - Describe a concept and get back a list of words