Hemingway - Hemingway App makes your writing bold and clear.
Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
exegesis - A writing app for disorganized, creative, nonlinear thinking
TeXstudio - TeXstudio is an integrated environment for writing LaTeX documents.
Ghost - Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.
LyX - LyX is a document processor.