WebbNote-Creator is a project mainly written in Perl, it's free.
This is a command line utility for "WebbNote" that allows you to write your presentations using Markdown.
WebbNote Creator is a command line tool to convert documents marked up as "Markdown" into WebbNote compatible HTML. It is written in Perl and should work seamlessly on Linux/*nix/OS X.
It was created by Henrik Carlsson in 2011. Neither Henrik nor the WebbNote Creator is in anyway affiliated with and/or endorsed by John Gruber
Just run it from the command line:
$ ./webbnote-creator.pl
With WebbNote Creator you write your presentation in any plain text editor, and use Markdown whenever appropriate. To make a new slide, simply use the tag
[newslide]
(You don't have to start your document with a [newslide] tag.) Any additional HTML needed will be added by WebbNote Creator or the Markdown parser.