Like a lot of developers I imagine, I've become used to seeing Markdown render in GitHub for documentation and README files.

On a Windows computer, I use the very nice (and free!) MarkdownPad by Evan Wondrasek. Not having found any other way/application that will allow me to preview my Markdown documents as close as possible to how they would look on GitHub, I put together this stylesheet. Maybe someone else will find it useful.

In MarkdownPad just got to Tools > Options > HTML/CSS, check Use custom stylesheet and paste in the content of markdownpad-github.css (erasing what was already in the textbox).

This is just a stylesheet, so the special functions and syntax highlighting of GitHub Flavored Markdown will not work (they would need to be integrated in the MarkdownPad application itself, maybe one day?).

For instance, writing this fenced code block in your Markdown document:

```python
def hello:
    print 'Hello World!'
```

Will not produce the desired result with syntax highlighting in MarkdownPad (but obviously will look fine once on GitHub).