Silicon Valley Dictionary - Urban dictionary meets Silicon Valley
StoryMill - Developers and publishers of Mac, Win, and iOS productivity, home and office and writing software such as MacGourmet, Paperless and many more. Based in MN.
Writefull Thesaurus - A Google Docs add-on that uses AI to give you synonyms
BlankPage - Stay motivated to write, and finish your story
FoxType Thesaurus - Visualize similar words for _____
Manuskript - Open-source tool for writers.