Reverse Dictionary - Describe a concept and get back a list of words
Spell - Deep Learning and AI accessible to everyone
Writefull Thesaurus - A Google Docs add-on that uses AI to give you synonyms
Hunspell - Hunspell is the spell checker of LibreOffice, OpenOffice.
Silicon Valley Dictionary - Urban dictionary meets Silicon Valley
Spell It Out - Spelling out tech acronyms so you can be in the know.