Writefull Thesaurus - A Google Docs add-on that uses AI to give you synonyms
Power Thesaurus - Power Thesaurus is a fast, comprehensive and easy-to-follow online thesaurus for writers...
Dictionary Anywhere - Dictionary Anywhere is an open-source and easy-to-use browser extension for Mozilla Firefox and Google Chrome that allows you to check definitions easily while browsing the web.
Reverse Dictionary - Describe a concept and get back a list of words
Silicon Valley Dictionary - Urban dictionary meets Silicon Valley
Eunoia - Words that don't translate