Sticky Notes - Sticky Notes is an integrated feature of adding notes in the Windows operating systems.
Markdown New Tab - Write notes in Markdown directly in the 'New Tab' page
StickyNoted - Sticky Note with Markdown flavour
NotesHub - Fully cross-platform, markdown based note-taking app
Big Decisions - An app that helps you make better decisions
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.