Qikipedia - Instant Wikipedia summary cards on any web page
Writefull Thesaurus - A Google Docs add-on that uses AI to give you synonyms
Newsit - Find the discussion around the page you're looking at!
Power Thesaurus - Power Thesaurus is a fast, comprehensive and easy-to-follow online thesaurus for writers...
Anycomplete - The magic of Google Autocomplete while you're typing
FoxType Thesaurus - Visualize similar words for _____