Textile is, like Markdown, a simplified markup format that can be easily converted into HTML.
Resources:
- Textile Editor Helper
- gedittextilepreview, a nice add-on to the default Gnome editor.
- html2textile – for converting snippets of HTML into Textile markup. Can be used with ThisService with good results (here’s a local copy).
- RedCloth – for Ruby.
- PyTextile – the library I use for Python.
- A live preview of a JavaScript converter.