A markdown viewer/reader and editor written with Python GTK.
git clone git://github.com/aviddiviner/markdowner
You'll need Python installed. My system came bundled with v2.6.5, but if you don't have it, a quick sudo apt-get install python or similar should fix things.
After that, you'll need to install the markdown library. I did this as follows:
git clone git://github.com/waylan/Python-Markdown.git
cd Python-Markdown/
sudo python setup.py install
(See http://www.freewisdom.org/projects/python-markdown/ for more info.)
You may now want to create a symlink in your bin folder or something similar:
sudo ln -s /path/to/your/markdowner.py /usr/local/bin/markdowner
Once you've done this, you can edit files by typing in your console markdowner <filename>
This is also easy. Right click on a markdown file, such as this README.md file and choose:
Properties > Open With > Add > Custom Command > markdowner
This is based off a script I found at http://www.jezra.net so thanks go out to him for the base of this.