SABnzbd - SABnzbd is a free/open-source cross-platform binary newsreader written in Python.

Tree - Write documents in tree-like organisation with Markdown

NZBGet - The most efficient usenet downloader.

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.

NewsBin - NewsBin Pro is a Usenet NNTP newsreader that downloads and decodes binary file attachments to...

Markdown Here - Google Chrome, Firefox, and Thunderbird extension that lets you write email in Markdown and render...