PHP Markdown

PHP port of the Markdown text-to-HTML conversion tool for web writers.
MarkPad

MarkPad is a Text editor for writing in MarkDown-Syntax.
Liquid Story Binder XE

Liquid Story Binder XE is a uniquely designed word processor for professional and aspiring authors…
Drivel

Drivel is a GNOME client for working with online journals, also known as weblogs or simply…
BloGTK

BloGTK is a weblog client that allows you to post to your weblog from GNOME without the need for a…
MarsEdit

MarsEdit is a desktop blog editing application for the Mac. It provides an offline interface to most popular blogging systems. WordPress, Blogger, Tumblr, Movable Type, and many other systems are supported.
SeMagic

Client for LiveJournal, Blogger, Wordpress.
Rentry.co

Markdown pastebin/publishing service with preview, custom urls and editing. Fast, simple and free.
Amazon Storywriter

Write your screenplay and focus on the story with features like auto-formatting, offline writing…