This is a quick and dirty test for Postmarkup, a bbcode rendering engine for Python.

Enter BBcode here:

Postmarkup is easily customizable, existing tags can be disabled and new ones added.

[size 32]Some sample bbcode[/size]
[list]
[*] Thread-safe
[*] Handles overlapping tags
e.g. [b]Bold [i]Bold and Italic[/b] Italic[/i]
[*]Link annotation (can be disabled)
e.g. [link http://www.becontrary.com]Best debating site on the net[/link]
[*] Syntax Highlighting code tag.
e.g. 
[code python]
class SimpleTag(TagBase):
    
    """A tag that can be rendered with a simple substitution. """
    
    def __init__(self, name, html_name):
        """ html_name -- the html tag to substitute."""
        TagBase.__init__(self, name, inline=True)
        self.html_name = html_name
            
    def render_open(self, parser, node_index):
        return u"<%s>"%self.html_name
    
    def render_close(self, parser, node_index):
        return u"</%s>"%self.html_name
[/code][/list]
Postmarkup [i]should[/i] produce sensible markup with any input. Let me know if it doesn't.

[img]http://www.willmcgugan.com/email.gif[/img]

Rendered BBCode

Postmarkup test server