NotePlan - Make plans inside an individual markdown note for every day in your calendar. Use it as a journal for your daily tasks and plan todos in advance. For Mac, iPhone and iPad.
Dr.Explain - Dr.Explain software is a help file authoring tool.
markdown to web - Convert markdown to online web page
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
WinCHM - Creating CHM file, Make CHM file, Web Help. WinCHM Pro - Help authoring software (CHM, WebHelp, DOC, PDF) . With this powerful tool you can not only create chm file from scratch, but also convert a set of existing HTML files to a chm file.