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.
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.
BlogHunch - BlogHunch is the next-generation blogging platform that lets you focus on building solid content rather than spinning your head around all the technicalities.
BlankPage - Stay motivated to write, and finish your story
Textio - Textio is a software where the user can get guidance on how to write the best hiring advertisement for people to submit their resumes for a job and to get the best results... read more.
Manuskript - Open-source tool for writers.